Thanks for the report, but users-admin is no longer developed upstream, and has been replaced with a new user accounts tool in the GNOME control center. In that tool, instead of an error message, an error icon is shown in the confirmation entry, which I think fixes the problem you raised.
Thanks for the report, but users-admin is no longer developed upstream, and has been replaced with a new user accounts tool in the GNOME control center. In that tool, instead of an error message, an error icon is shown in the confirmation entry, which I think fixes the problem you raised.