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

Try like below:

ngrok http 127.0.0.1:8080 -host-header="127.0.0.1:8080"