Samba config GUI doesn't show after entering password

Solution 1:

Should run Samba from Terminal.

$ gksu system-config-samba

If returns error message with last line similar to this:

SystemError: could not open configuration file '/etc/libuser.conf': No such file or directory

Create the missing file:

$ sudo touch /etc/libuser.conf

and run Samba again

$ gksu system-config-samba

Thanks Morbius1 for solution ubuntuforum.