I am trying to make a facebook messenger bot, I am using c9.io as my remote server for node.js app and used this code from this repo: https://github.com/fbsamples/messenger-platform-samples/tree/master/node
My app.js looks good running: Debugger listening on port 15454 Node app is running on port 8080
But I have one problem when trying to create webhook:
This is the message I get:
The URL couldn't be validated. Response does not match challenge, expected value = '561638383', received='
I am giving 'https://facebook-bot2-lulzimfazlija.c9users.io' as Callback URL, but for some reason it shows the error above.
Anyone knows what is the issue here?