diff --git a/src/backend/langflow/api/v1/chat.py b/src/backend/langflow/api/v1/chat.py
index bd24806ff..eb6d13ef5 100644
--- a/src/backend/langflow/api/v1/chat.py
+++ b/src/backend/langflow/api/v1/chat.py
@@ -61,7 +61,12 @@ async def chat(
         await websocket.close(code=status.WS_1011_INTERNAL_ERROR, reason=str(exc))
     except Exception as exc:
         logger.error(f"Error in chat websocket: {exc}")
-        await websocket.close(code=status.WS_1011_INTERNAL_ERROR, reason=str(exc))
+        if "Could not validate credentials" in str(exc):
+            await websocket.close(
+                code=status.WS_1008_POLICY_VIOLATION, reason="Unauthorized"
+            )
+        else:
+            await websocket.close(code=status.WS_1011_INTERNAL_ERROR, reason=str(exc))
 
 
 @router.post("/build/init/{flow_id}", response_model=InitResponse, status_code=201)