Good evening,
I was having the same issue as reported by some others, whereby the system bumps you back to the main homepage after trying to authenticate with google. It had been happening only with one agent but since started happening with me. I can no longer login. Because I selected 'google' as the required login menu on the helpdesk admin for all users, I cannot login with anyone's password. I tried renaming the plugin from auth-oauth2 to something else, and the login with google option disappeared, but my password still does not work. Any workaround? I am not sure what to change in the DB. Tried a couple of things but nothing works.
Thanks.