diff --git a/lib/Controllers/TransferController.php b/lib/Controllers/TransferController.php
index e2883ba..a21f050 100644
--- a/lib/Controllers/TransferController.php
+++ b/lib/Controllers/TransferController.php
@@ -130,10 +130,7 @@ class TransferController extends ControllerAbstract
                 $variant,
             );
             if ($preview === null) {
-                return new JsonResponse([
-                    'status' => 'error',
-                    'error' => ['code' => 404, 'message' => 'Preview unavailable'],
-                ], Response::HTTP_NOT_FOUND);
+                return new Response('', Response::HTTP_NO_CONTENT);
             }
 
             $response = new StreamedResponse($preview->resource->stream());