Manjaro Settings Manager, Locale Settings goes back to original values when Applying

I am using Gnome Manjaro over XRDP (installed from AUR). If I try to edit locale settings (removing or adding) and save, it goes back to the default values. I am not sure if this is because it is RDP or not but I cannot test it locally for now. Do you know the cause of this?

Normally it ask through polkit, to be exactly: pkexec, for privs to remove it.

So Polkit is not installed/running on your system?

Looks like related to:

Therefore, there is problem with XRDP and Polkit somehow.

Try maybe tigervnc instead: