I have been trying to add test users to my app (Manage App->Test->Log in with ring), but in the past couple of days, it gives me a 406 error, and I am unable to add. I had one test user, but made the poor decision to remove all staging users, and so now I have no test users.
Please fix this to allow adding test users. Thanks!
**This is what is shown:
Authentication Failed**
Missing required parameters: code or state
