What does the error "oops, this link isn't working..." mean for Cloud Authentication?

When initially configuring an Azure AD Enterprise Application you may encounter this error message:

oops, this link isn't working...
This link to Application Name is invalid. Click the link below to see what applications you have access to. Otherwise, contact your administrator or the person who gave you this link to resolve the issue.

This usually means the Enterprise Application has "User assignment required?" set to Yes (the default) and the user attempting to sign-in has not been assigned to the Application directly or through a group.

Screenshot of error message:

Details

Article ID: 1559
Created
Thu 2/13/20 3:50 PM