@@ -188,7 +188,10 @@ class MessagesAPIView(APIView):
             return Response(MessageSerializer(output_messages, many=True).data, 201)
         else:
             logger.info(serializer.errors)
-            return Response({'detail': '; '.join(serializer.errors['non_field_errors'])}, 400)
+            return Response(
+                {'detail': '; '.join([str(error) for error in sum(serializer.errors.values(), [])])},
+                400,
+            )
 
 
 class MessageAPIView(APIView):
@@ -158,9 +158,16 @@ class MediaAPIView(APIView):
                 input_message.save()
                 if isinstance(exc, InsufficientBalance):
                     return Response({'detail': f'{exc}'}, status=HTTP_402_PAYMENT_REQUIRED)
-                if isinstance(exc, (
-                        UnsupportedSize, RequestBlocked, FileNotProvided, ImageContentNotFound, InvalidStyleCombinationError
-                )):
+                if isinstance(
+                    exc,
+                    (
+                        UnsupportedSize,
+                        RequestBlocked,
+                        FileNotProvided,
+                        ImageContentNotFound,
+                        InvalidStyleCombinationError,
+                    ),
+                ):
                     return Response({'detail': f'{exc}'}, status=HTTP_400_BAD_REQUEST)
                 return Response(
                     {
@@ -173,7 +180,10 @@ class MediaAPIView(APIView):
             return Response(MessageSerializer(output_messages, many=True).data, 201)
         else:
             logger.info(serializer.errors)
-            return Response({'detail': '; '.join(serializer.errors['non_field_errors'])}, 400)
+            return Response(
+                {'detail': '; '.join([str(error) for error in sum(serializer.errors.values(), [])])},
+                400,
+            )
 
 
 class ModelImagesAPIView(MediaAPIView):