Webhook creation with ngrok and CI with Jenkins

[Gouri S]

I am doing some research with Jenkins. I want to use CI with GitHub for Jenkins job. I used ngrok utility to create public url. I tried creating WebHook in GitHub but always get error as Invalid HTTP response 403. I also get No valid crumb was included in the request. I tried changing CSRF for Jenkins as was mentioned in some posts. But nothing works. Please let me know if I am missing anything.