502 Bad Gateway The server returned an invalid or incomplete response

[ImTrojanxx]

No description provided.

[dprothero]

Can you confirm your web server project is actually running? This is usually the error that is returned when ngrok is running, but your server is not running.

[dprothero]

Another reason we have found for this error is if you are using a new ASP.NET Core project that now defaults to https. whereas ngrok only works with http. If you change your project to turn off https, that should solve the issue. See this article:
https://stackoverflow.com/questions/46507029/how-to-disable-https-in-visual-studio-2017-web-proj-asp-net-core-2-0