I had an app with "Google" authentication setup on the General settings page.  Since we are a Google apps domain, I went through the steps of enabling Zoho Creator on our apps domain (installed it on our domain and enabled "Google Apps" on the General settings page.

After doing this, I discovered an OAuth 2 error when any of our sub-domains try to log in with their google apps credentials (we have a primary domain with some users, and multiple additional domains within our google apps account).  Since this was a major issue for us, I moved the authentication back to "Google" and deleted Zoho creator from our Google apps domain.

Now when I add a new user to my application, I get the following message when trying to log in from the mobile iOS app: "An unexpected error has occurred".  That's it, nothing else.  I have tried every variation imaginable to resolve this issue.

I am in a major time crunch and would appreciate any help possible.