Samba GUI will not start 18.04
Solution 1:
I had the same exact issue. To fix it I ran:
sudo system-config-samba
The very last line of the output read:
SystemError: could not open configuration file '/etc/libuser.conf': No such file or directory
I simply created the file by using:
sudo touch /etc/libuser.conf
and it worked fine.
I couldn't seem to get it to appear in the application screen, but can be run by
sudo system-config-samba
from the terminal.