diff --git a/components/application-mgt/io.entgra.application.mgt.core/src/main/java/io/entgra/application/mgt/core/impl/ApplicationManagerImpl.java b/components/application-mgt/io.entgra.application.mgt.core/src/main/java/io/entgra/application/mgt/core/impl/ApplicationManagerImpl.java
index b570adff88a..33ad0f1bde8 100644
--- a/components/application-mgt/io.entgra.application.mgt.core/src/main/java/io/entgra/application/mgt/core/impl/ApplicationManagerImpl.java
+++ b/components/application-mgt/io.entgra.application.mgt.core/src/main/java/io/entgra/application/mgt/core/impl/ApplicationManagerImpl.java
@@ -1494,7 +1494,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
-            String msg = "Error occured when getting, either application tags or application categories";
+            String msg = "Error occurred when getting, either application tags or application categories";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } finally {
@@ -1768,7 +1768,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (LifeCycleManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured while deleting life-cycle state data of application releases of the application"
+            String msg = "Error occurred while deleting life-cycle state data of application releases of the application"
                     + " which has application ID: " + applicationDTO.getId();
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -1885,7 +1885,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                     throw new ApplicationManagementException(msg, e);
                 } catch (ApplicationManagementDAOException e) {
                     ConnectionManagerUtil.rollbackDBTransaction();
-                    String msg = "Error occurred while verifying whether application relase has an subscription or "
+                    String msg = "Error occurred while verifying whether application release has an subscription or "
                             + "not. Application release UUID: " + releaseUuid;
                     log.error(msg, e);
                     throw new ApplicationManagementException(msg, e);
@@ -1934,7 +1934,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             ConnectionManagerUtil.commitDBTransaction();
         } catch (DBConnectionException e) {
             String msg =
-                    "Error occured when getting DB connection to update image artifacts of the application release "
+                    "Error occurred when getting DB connection to update image artifacts of the application release "
                             + "which has  uuid " + uuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -1946,13 +1946,13 @@ public class ApplicationManagerImpl implements ApplicationManager {
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
             String msg =
-                    "Error occured while getting application release data for updating image artifacts of the application release uuid "
+                    "Error occurred while getting application release data for updating image artifacts of the application release uuid "
                             + uuid + ".";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured while updating image artifacts of the application release uuid " + uuid + ".";
+            String msg = "Error occurred while updating image artifacts of the application release uuid " + uuid + ".";
             log.error(msg, e);
             throw new ApplicationManagementException(msg , e);
         } finally {
@@ -1981,7 +1981,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                 throw new BadRequestException(msg);
             }
         } catch (DeviceManagementException e) {
-            String msg = "Error occured while getting supported device types in IoTS";
+            String msg = "Error occurred while getting supported device types in IoTS";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         }
@@ -2023,16 +2023,16 @@ public class ApplicationManagerImpl implements ApplicationManager {
             ConnectionManagerUtil.commitDBTransaction();
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured while getting/updating APPM DB for updating application Installer.";
+            String msg = "Error occurred while getting/updating APPM DB for updating application Installer.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (TransactionManagementException e) {
-            String msg = "Error occured while starting the transaction to update application release artifact which has "
+            String msg = "Error occurred while starting the transaction to update application release artifact which has "
                     + "application uuid " + releaseUuid + ".";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (DBConnectionException e) {
-            String msg = "Error occured when getting DB connection to update application release artifact of the "
+            String msg = "Error occurred when getting DB connection to update application release artifact of the "
                     + "application release uuid " + releaseUuid + ".";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -2043,7 +2043,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when updating application installer.";
+            String msg = "Error occurred when updating application installer.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } finally {
@@ -2241,7 +2241,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when getting existing categories or when inserting new application categories.";
+            String msg = "Error occurred when getting existing categories or when inserting new application categories.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } finally {
@@ -2563,7 +2563,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                 applicationDAO.deleteApplicationTag(tag.getId(), applicationDTO.getId(), tenantId);
                 ConnectionManagerUtil.commitDBTransaction();
             } else {
-                String msg = "Tag " + tagName + " is not an application tag. Application ID: " + appId;
+                String msg = "Tag " + tagName + " is not an application tag. Application name: " + applicationDTO.getName();
                 log.error(msg);
                 throw new BadRequestException(msg);
             }
@@ -2771,7 +2771,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                         .collect(Collectors.toList());
             } else {
                 String msg = "Tag list is either null or empty. In order to add new tags for application which has "
-                        + "application ID: " + appId +", tag list should be a list of Stings. Therefore please "
+                        + "application name: " + applicationDTO.getName() +", tag list should be a list of Stings. Therefore please "
                         + "verify the payload.";
                 log.error(msg);
                 throw new BadRequestException(msg);
@@ -2877,11 +2877,17 @@ public class ApplicationManagerImpl implements ApplicationManager {
     @Override
     public void updateCategory(String oldCategoryName, String newCategoryName) throws ApplicationManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
+        if (StringUtils.isEmpty(oldCategoryName) || StringUtils.isEmpty(newCategoryName)) {
+            String msg = "Either old category name or new category name contains empty/null value. Hence please verify the "
+                    + "request.";
+            log.error(msg);
+            throw new BadRequestException(msg);
+        }
         try {
             ConnectionManagerUtil.beginDBTransaction();
             CategoryDTO category = applicationDAO.getCategoryForCategoryName(oldCategoryName, tenantId);
             if (category == null){
-                String msg = "Couldn't found a category for tag name " + oldCategoryName + ".";
+                String msg = "Couldn't found a category for category name " + oldCategoryName + ".";
                 log.error(msg);
                 throw new NotFoundException(msg);
             }
@@ -2893,7 +2899,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (TransactionManagementException e) {
-            String msg = "Database access error is occurred when updating categiry.";
+            String msg = "Database access error is occurred when updating category.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
@@ -3068,11 +3074,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when updating Ent Application release of UUID: " + releaseUuid;
+            String msg = "Error occurred when updating Ent Application release of UUID: " + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
-            String msg = "Error occured when updating application release artifact in the file system. Ent App release "
+            String msg = "Error occurred when updating application release artifact in the file system. Ent App release "
                     + "UUID:" + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -3137,11 +3143,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when updating public app release of UUID: " + releaseUuid;
+            String msg = "Error occurred when updating public app release of UUID: " + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
-            String msg = "Error occured when updating public app release artifact in the file system. Public app "
+            String msg = "Error occurred when updating public app release artifact in the file system. Public app "
                     + "release UUID:" + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -3202,11 +3208,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when updating web app release for web app Release UUID: " + releaseUuid;
+            String msg = "Error occurred when updating web app release for web app Release UUID: " + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
-            String msg = "Error occured when updating web app release artifact in the file system. Web app "
+            String msg = "Error occurred when updating web app release artifact in the file system. Web app "
                     + "release UUID:" + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -3327,11 +3333,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             throw new ApplicationManagementException(msg, e);
         } catch (ApplicationManagementDAOException e) {
             ConnectionManagerUtil.rollbackDBTransaction();
-            String msg = "Error occured when updating Ent Application release of UUID: " + releaseUuid;
+            String msg = "Error occurred when updating Ent Application release of UUID: " + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (ResourceManagementException e) {
-            String msg = "Error occured when updating application release artifact in the file system. Ent App release "
+            String msg = "Error occurred when updating application release artifact in the file system. Ent App release "
                     + "UUID:" + releaseUuid;
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -3705,7 +3711,7 @@ public class ApplicationManagerImpl implements ApplicationManager {
                 throw new BadRequestException(msg);
             }
             if (StringUtils.isEmpty(webAppReleaseWrapper.getUrl())) {
-                String msg = "URL should't be null for the application release creating request for application type "
+                String msg = "URL shouldn't be null for the application release creating request for application type "
                         + "WEB_CLIP";
                 log.error(msg);
                 throw new BadRequestException(msg);
@@ -3885,11 +3891,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             }
             ConnectionManagerUtil.commitDBTransaction();
         } catch (ApplicationManagementDAOException e) {
-            String msg = "Error occured while updating app subscription status of the device.";
+            String msg = "Error occurred while updating app subscription status of the device.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (DBConnectionException e) {
-            String msg = "Error occurred while obersving the database connection to update aoo subscription status of "
+            String msg = "Error occurred while observing the database connection to update aoo subscription status of "
                     + "device.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
@@ -3916,11 +3922,11 @@ public class ApplicationManagerImpl implements ApplicationManager {
             }
             ConnectionManagerUtil.commitDBTransaction();
         } catch (ApplicationManagementDAOException e) {
-            String msg = "Error occured while updating app subscription status of the device.";
+            String msg = "Error occurred while updating app subscription status of the device.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
         } catch (DBConnectionException e) {
-            String msg = "Error occurred while obersving the database connection to update aoo subscription status of "
+            String msg = "Error occurred while observing the database connection to update aoo subscription status of "
                     + "device.";
             log.error(msg, e);
             throw new ApplicationManagementException(msg, e);
diff --git a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
index 21ad941f69a..119a08f10bb 100644
--- a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
+++ b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/ApplicationManagementPublisherAPIImpl.java
@@ -89,11 +89,11 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             ApplicationList applications = applicationManager.getApplications(filter);
             return Response.status(Response.Status.OK).entity(applications).build();
         } catch (BadRequestException e) {
-            String msg = "Incompatible request payload is found. Please try with valid request payload.";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (UnexpectedServerErrorException e) {
-            String msg = "Error Occured when getting supported device types by Entgra IoTS";
+            String msg = "Error occurred when getting supported device types by Entgra IoTS";
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -173,7 +173,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         try {
             return createApplication(applicationWrapper, isPublished);
         } catch (BadRequestException e) {
-            String msg = "Found incompatible payload with ent. app creating request.";
+            String msg = "Found incompatible payload with ent. app creating request. Please try with valid request payload.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -195,7 +195,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         try {
             return createApplication(webAppWrapper, isPublished);
         } catch (BadRequestException e) {
-            String msg = "Found incompatible payload with web app creating request.";
+            String msg = "Found incompatible payload with web app creating request. Please try with valid request payload.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -217,7 +217,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         try {
             return createApplication(publicAppWrapper, isPublished);
         } catch (BadRequestException e) {
-            String msg = "Found incompatible payload with pub app creating request.";
+            String msg = "Found incompatible payload with pub app creating request. Please try with valid request payload.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -239,7 +239,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         try {
             return createApplication(customAppWrapper, isPublished);
         } catch (BadRequestException e) {
-            String msg = "Found incompatible payload with custom app creating request.";
+            String msg = "Found incompatible payload with custom app creating request. Please try with valid request payload.";
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -267,7 +267,11 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             ApplicationRelease release = applicationManager.createEntAppRelease(appId, entAppReleaseWrapper, isPublished);
             return Response.status(Response.Status.CREATED).entity(release).build();
         } catch (RequestValidatingException e) {
-            String msg = "Error occurred while validating binaryArtifact";
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
+        } catch (BadRequestException e){
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -291,6 +295,10 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             applicationManager.validatePublicAppReleaseCreatingRequest(publicAppReleaseWrapper, deviceTypeName);
             ApplicationRelease applicationRelease = applicationManager.createPubAppRelease(appId, publicAppReleaseWrapper, isPublished);
             return Response.status(Response.Status.CREATED).entity(applicationRelease).build();
+        } catch (BadRequestException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String msg = "Error occurred while creating application release for the application with the id " + appId;
             log.error(msg, e);
@@ -300,7 +308,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (RequestValidatingException e) {
-            String msg = "Invalid payload found in public app release create request";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         }
@@ -318,6 +326,10 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             applicationManager.validateWebAppReleaseCreatingRequest(webAppReleaseWrapper);
             ApplicationRelease applicationRelease= applicationManager.createWebAppRelease(appId, webAppReleaseWrapper, isPublished);
             return Response.status(Response.Status.CREATED).entity(applicationRelease).build();
+        } catch (BadRequestException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ResourceManagementException e) {
             String msg = "Error occurred while uploading application release artifacts";
             log.error(msg, e);
@@ -327,7 +339,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             log.error(msg, e);
             return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (RequestValidatingException e) {
-            String msg = "Invalid payload found in web app release create request";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         }
@@ -346,8 +358,12 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             applicationManager.validateCustomAppReleaseCreatingRequest(customAppReleaseWrapper, deviceTypeName);
             ApplicationRelease release = applicationManager.createCustomAppRelease(appId, customAppReleaseWrapper, isPublished);
             return Response.status(Response.Status.CREATED).entity(release).build();
+        } catch (BadRequestException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (RequestValidatingException e) {
-            String msg = "Error occurred while validating binaryArtifact";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ResourceManagementException e) {
@@ -386,7 +402,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             }
             return Response.status(Response.Status.OK).build();
         } catch (BadRequestException e) {
-            String msg = "Found invalid device type to check application existence.";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -460,6 +476,10 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             String msg = "Found an invalid device type: " + deviceType + " with the request";
             log.error(msg);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
+        } catch (ForbiddenException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String msg = "Error occurred while updating the image artifacts of the application with the uuid "
                     + applicationReleaseUuid;
@@ -483,8 +503,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             log.error(msg, e);
             return Response.status(Response.Status.NOT_FOUND).entity(msg).build();
         } catch (BadRequestException e) {
-            String msg = "Error occurred while modifying the application. Found bad request payload for updating the "
-                    + "application";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
@@ -514,8 +533,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             }
             return Response.status(Response.Status.OK).entity(applicationRelease).build();
         } catch (BadRequestException e) {
-            String msg =
-                    "Invalid request to update ent app release for application release UUID " + applicationUUID;
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
@@ -555,7 +573,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             }
             return Response.status(Response.Status.OK).entity(applicationRelease).build();
         } catch (BadRequestException e) {
-            String msg = "Invalid request to update public app release for application release UUID " + applicationUUID;
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
@@ -595,7 +613,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             }
             return Response.status(Response.Status.OK).entity(applicationRelease).build();
         } catch (BadRequestException e) {
-            String msg = "Invalid request to update web app release for web app release UUID " + applicationUUID;
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
@@ -634,8 +652,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
             }
             return Response.status(Response.Status.OK).entity(applicationRelease).build();
         } catch (BadRequestException e) {
-            String msg =
-                    "Invalid request to update ent app release for application release UUID " + applicationUUID;
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
@@ -685,7 +702,7 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
                     .changeLifecycleState(applicationUuid, lifecycleChanger);
             return Response.status(Response.Status.CREATED).entity(applicationRelease).build();
         } catch (BadRequestException e) {
-            String msg = "Request payload contains invalid data, hence verify the request payload.";
+            String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.BAD_REQUEST).build();
         } catch (ForbiddenException e) {
@@ -847,6 +864,10 @@ public class ApplicationManagementPublisherAPIImpl implements ApplicationManagem
         try {
             List<String> applicationTags = applicationManager.addApplicationTags(appId, tagNames);
             return Response.status(Response.Status.OK).entity(applicationTags).build();
+        } catch (BadRequestException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
             String msg = e.getMessage();
             log.error(msg, e);
diff --git a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/SPApplicationServiceImpl.java b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/SPApplicationServiceImpl.java
index 4abe861ce81..4eacf5accf4 100644
--- a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/SPApplicationServiceImpl.java
+++ b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/SPApplicationServiceImpl.java
@@ -96,6 +96,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "Identity server with the id " + id + " does not exist.";
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String errMsg = "Error occurred while trying to merge identity server apps with existing apps";
@@ -115,6 +116,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "Identity server with the id " + id + " does not exist.";
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String errMsg = "Error occurred while trying to merge identity server apps with existing apps";
@@ -134,9 +136,10 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "Identity server with the id " + id + " does not exist.";
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (BadRequestException e) {
-            String errMsg = "Identity server request payload is invalid";
+            String errMsg = e.getMessage();
             log.error(errMsg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(errMsg).build();
         } catch (ApplicationManagementException e) {
@@ -156,8 +159,8 @@ public class SPApplicationServiceImpl implements SPApplicationService {
             IdentityServerResponse identityServer = spAppManager.createIdentityServer(identityServerDTO);
             return Response.status(Response.Status.CREATED).entity(identityServer).build();
         } catch (BadRequestException e) {
-            String errMsg = "Identity server request payload is invalid";
-            log.error(errMsg, e);
+            String errMsg = e.getMessage();
+                    log.error(errMsg, e);
             return Response.status(Response.Status.BAD_REQUEST).entity(errMsg).build();
         } catch (ApplicationManagementException e) {
             String errMsg = "Error occurred while trying to merge identity server apps with existing apps";
@@ -232,6 +235,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String errMsg = "No Identity server exist with the id: " + identityServerId;
             log.error(errMsg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(errMsg).build();
         } catch (ApplicationManagementException e) {
             String errMsg = "Error occurred while trying to merge identity server apps with existing apps";
@@ -252,6 +256,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "No identity server exist with the id " + identityServerId;
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (BadRequestException e) {
             String msg = "Invalid appIds provided";
@@ -277,6 +282,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "No identity server exist with the id " + identityServerId;
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (BadRequestException e) {
             String msg = "Invalid appIds provided";
@@ -343,6 +349,7 @@ public class SPApplicationServiceImpl implements SPApplicationService {
         } catch (NotFoundException e) {
             String msg = "No identity server exist with the id " + identityServerId;
             log.error(msg, e);
+            // TODO : the correct way is to use the NOT_FOUND response here. In order to do it changes are needed for the UI code as well
             return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (BadRequestException e) {
             String msg = "Found incompatible payload with create service provider app request.";
diff --git a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
index 9dae875ca88..6fd83760103 100644
--- a/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
+++ b/components/application-mgt/io.entgra.application.mgt.publisher.api/src/main/java/io/entgra/application/mgt/publisher/api/services/impl/admin/ApplicationManagementPublisherAdminAPIImpl.java
@@ -155,6 +155,10 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
             applicationManager.updateCategory(oldCategoryName, newCategoryName);
             return Response.status(Response.Status.OK)
                     .entity("Category is updated from " + oldCategoryName + " to " + newCategoryName).build();
+        } catch (BadRequestException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.BAD_REQUEST).entity(msg).build();
         } catch (NotFoundException e) {
             String msg = e.getMessage();
             log.error(msg, e);
@@ -181,6 +185,10 @@ public class ApplicationManagementPublisherAdminAPIImpl implements ApplicationMa
             String msg = e.getMessage();
             log.error(msg, e);
             return Response.status(Response.Status.NOT_FOUND).entity(msg).build();
+        } catch (ForbiddenException e) {
+            String msg = e.getMessage();
+            log.error(msg, e);
+            return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
         } catch (ApplicationManagementException e) {
             String msg = "Error Occurred while deleting registered category.";
             log.error(msg, e);