Whatsapp Trigger error

Hey folks,
While setting up WhatsApp in n8n, I am getting this error. How do I fix it?

Problem running workflow

Bad request - please check your parameters

Show Details

WhatsApp Trigger: (#2200) Callback verification failed with the following errors: curl_errno = 28; curl_error = Operation timed out after 6000 milliseconds with 0 bytes received; HTTP Status Code = 200; HTTP Message = Connection established

getting this in terminal
Received request for unknown webhook: The requested webhook “63f3b7d8-db61-4bc4-bbf0-ae892e0ae2b6/webhook” is not registered.