@AbuIshak To verify please type
Callback URL: https://cc5e480e9977.ngrok.io/webhooks/facebook/webhook
Verify Token: Your app name same as you mention in the credential.yml
Note: Check the commenting in the credential.yml, un-comment the code under Facebook.
For more help please see this Facebook Messenger OR What Callback URL should be for integration with FB messenger?
Hope this time it will work, I have checked and linked my bot for you, and it’s connecting.