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

This worked for me

ngrok.exe http -host-header=rewrite localhost:

e.g ngrok.exe http -host-header=rewrite localhost:5219

Im using visual studio 2017 dont know if it effects anthing.