Ngrok errors '502 bad gateway'

Question

Quite new to using any sort of Web App stuff, and I\'ve been trying to slowly build a Facebook Messenger Bot. When I try to use ngrok I can\'t visit the address I\'m given,

Answer 1

If you are trying to use ngrok to point to an https localhost url, set up a proxy.

see this github issue comment:

https://github.com/inconshreveable/ngrok/issues/448#issuecomment-414214242