I have this problem in one Ubuntu 18.04
journalctl -e Sep 06 17:54:28 ubuntu dbus-daemon[723]: [system] Activating service name='com.ubuntu.SoftwareProperties' requested by ':1.106' (uid=1000 pid=6185 comm="/usr/bin/python3 /usr/bin/software-properties-gtk " label="unconfined") (using servicehelper) Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: Unable to init server: Could not connect: Connection refused Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: Unable to init server: Could not connect: Connection refused Sep 06 17:54:28 ubuntu dbus-daemon[723]: [system] Successfully activated service 'com.ubuntu.SoftwareProperties' Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: Traceback (most recent call last): Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: File "/usr/lib/software-properties/software-properties-dbus", line 68, in <module> Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: server = SoftwarePropertiesDBus(bus, datadir=datadir) Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: File "/usr/lib/python3/dist-packages/softwareproperties/dbus/SoftwarePropertiesDBus.py", line 66, in __init__ Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: self._livepatch_service = LivepatchService() Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: File "/usr/lib/python3/dist-packages/softwareproperties/LivepatchService.py", line 93, in __init__ Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: self._session = requests_unixsocket.Session() Sep 06 17:54:28 ubuntu com.ubuntu.SoftwareProperties[723]: NameError: name 'requests_unixsocket' is not defined -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1830914 Title: software-properties-gtk does not run at all! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1830914/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs