Hi Peter,
That error usually happens whenever the URL configured in the OwnID console is not the correct one. Hence, our server can’t call your site and shows the error “Account does not exist”.
If you drop me an email to [email protected], I’ll be more than happy to assists. Also, if you prefer, just give me here in the responses the AppID of your OwnID application and we will take a look.
Thank you!
Víctor