Symptoms- Various tasks in Plesk are never executed, their status in the menu Tools & Settings > Task Manager is stuck in "new".
- The following error can be found in the log file /var/log/plesk/task-manager.log:
ERROR Cannot fetch process properties: Cannot fetch 'run-plesk-task-93137.service'
unit properties: dbus: connection closed by user
CauseThe service dbus.socket is stuck.
Resolution- Connect to the server via SSH.
- Restart services dbus.socket and plesk-task-manager:
#systemctl restart dbus.socket plesk-task-manager
Warning: in Debian 10 or Ubuntu 18.04, there might be the service polkit, which also
should be up and running. Restart it using the command systemctl restart polkit in case the issue
persists on these operating systems.