Before anybody marks this as duplicate:
I have read almost all similar topics here without any solution for my particular case. I have an app which has passed "App details" review, has all the forms filled in (including contact email) and is published with full green circle in dashboard besides app name.
And yet I receive the same "The developers of this app have not set up this app properly.." message when trying to access the app:
Could it be that after publishing the app you have to wait for additional 24 hours before it really becomes public?
App ID: 387142881474933