It is openldap server.
Problem is not username, top right corner, it is “Name” displayed.
I intentionally use ascii characters on username.
Name, I write as in its original, and see just as I typed in user list.
I also find it just fine when I “edit”
It is only removed from non-ascii characters on top right corner.
BTW, I failed to login using a regular user (just the above one I created for test purposes). I see below in /var/log/messages
May 12 09:53:11 neth cockpit-session: pam_ssh_add: Failed adding some keys
May 12 09:53:11 neth systemd: Created slice User Slice of email@example.com.
May 12 09:53:11 neth systemd: Started Session 45 of user firstname.lastname@example.org.
May 12 09:53:11 neth systemd-logind: New session 45 of user email@example.com.
On browser, I only see below:
After sometime about 30 seconds I see on browser
Authentication failed: Timeout
and on /var/log/messages
May 12 09:53:41 neth cockpit-ws: cockpit-session: session timed out during authentication
May 12 09:53:41 neth cockpit-ws: cockpit-session: authentication timed out
May 12 09:53:41 neth systemd-logind: Removed session 45.
May 12 09:53:41 neth systemd: Removed slice User Slice of firstname.lastname@example.org.
I can login just fine using root user.
Just for the record, I am behind a Squid Proxy server if that makes any difference.