I'm having a similar issue. I resolved everything, the app is still restricted, and there's nowhere to respond.

I'm having the same issue. I'm seeing a red banner: API access restricted. Respond to required actions to restore access" View required actions

But if i click on View Required actions then the page is EMPTY. Probably because the DUE date is past from one of my previous actions but I can't resolve this one anymore. So now I'm stuck.