You app may not be accessible to your users for the following reasons:
Reason 1: Your app may be locked because you have more active users than purchased licenses. This video guides you how to check your active user count and purchase the necessary licenses to resolve the issue.
Reason 2: Your apps may be blocked if you have more than 10 users in any of your prototype apps
Action 4: Your apps may be blocked if you have more than 10 users in any of your prototype apps