'App Not Found' Error During OAuth Authorisation for Public App in Sandbox Environment

Hello there,

I’m currently working on a public app in my sandbox account and am trying to test the OAuth authorisation process from a normal user account in a different company/ Organisation. However, I’m encountering an “app not found” error when attempting to initiate the authorisation.

Is there a way to further diagnose or troubleshoot this issue?

Any guidance or suggestions would be greatly appreciated!

Thank you in advance!