Comment # 1 on bug 1072025 from Andrei Verovski

yast2 --gtk
works, but throws these messages

The GTK GUI has been retired, falling back to Qt.
QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000
instead of 0
QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000
instead of 0
klauncher not running... launching kdeinit
QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000
instead of 0
QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000
instead of 0
QStandardPaths: wrong ownership on runtime directory /run/user/1000, 1000
instead of 0
No DBUS session-bus found. Check if you have started the DBUS server.
kdeinit5: Communication error with launcher. Exiting!
"KLauncher could not be reached via D-Bus. Error when calling
kdeinit_exec_wait:\nNot connected to D-Bus server\n"
Don't need password!!