So I was trying to make a Facebook chat bot using Laravel and ngrok. When I was asked to setup the webhook for the Facebook messenger API, I used ngrok to forward my localhost.
The problem is, it can't seem to validate the callback URL needed to setup the webhook. I used this link: https://b509de71.ngrok.io, generated by ngrok.
This is the error message I get:
The URL couldn't be validated. Response does not match challenge, expected value="211653810", received="\u003C!doctype html>\n\u003Ch..."
Any thoughts would be greatly appreciated!