Fixes

app.py

@@ -51,7 +51,7 @@ async def verify_webhook(request: Request):
         raise HTTPException(status_code=403, detail="Verification failed")
 
 @app.post("/webhook")
-async def receive_message(request: Request):
+async def receive_message(request: Request, background_tasks: BackgroundTasks):
     """
     Endpoint to receive incoming WhatsApp messages.
     """