CB

When saving a user or registration immediately without touching the ajax input fields they immediately display "error" below them. Seams intentional to stop the ajax checking on save so it won't delay the registration or save action, but it should simply display nothing at all or better yet don't even execute unless the actual field is selected and used.

https://www.joomlapolis.com/forum/153-professional-member-support/176992-error-message-in-user-management-and-registration