diff --git a/backend/src/ee/services/external-kms/external-kms-service.ts b/backend/src/ee/services/external-kms/external-kms-service.ts
index 8dd80ce2c..faaace343 100644
--- a/backend/src/ee/services/external-kms/external-kms-service.ts
+++ b/backend/src/ee/services/external-kms/external-kms-service.ts
@@ -1,7 +1,9 @@
+import { KMSServiceException } from "@aws-sdk/client-kms";
+import { STSServiceException } from "@aws-sdk/client-sts";
 import { ForbiddenError } from "@casl/ability";
 import slugify from "@sindresorhus/slugify";
 
-import { BadRequestError, NotFoundError } from "@app/lib/errors";
+import { BadRequestError, InternalServerError, NotFoundError } from "@app/lib/errors";
 import { alphaNumericNanoId } from "@app/lib/nanoid";
 import { TKmsKeyDALFactory } from "@app/services/kms/kms-key-dal";
 import { TKmsServiceFactory } from "@app/services/kms/kms-service";
@@ -71,7 +73,16 @@ export const externalKmsServiceFactory = ({
     switch (provider.type) {
       case KmsProviders.Aws:
         {
-          const externalKms = await AwsKmsProviderFactory({ inputs: provider.inputs });
+          const externalKms = await AwsKmsProviderFactory({ inputs: provider.inputs }).catch((error) => {
+            if (error instanceof STSServiceException || error instanceof KMSServiceException) {
+              throw new InternalServerError({
+                message: error.message ? `AWS error: ${error.message}` : ""
+              });
+            }
+
+            throw error;
+          });
+
           // if missing kms key this generate a new kms key id and returns new provider input
           const newProviderInput = await externalKms.generateInputKmsKey();
           sanitizedProviderInput = JSON.stringify(newProviderInput);