Plesk update/upgrade fails with the following error in
[2017-05-11 15:06:34.889279] Warning: Failed to attach to cgroup /sys/fs/cgroup/systemd/user/root/tasks, installer might be unexpectedly killed later by the system
[2017-05-11 15:06:34.889510] DEBUG: web server PID: 5688
[2017-05-11 15:06:36.892013] Error: Can't start build-in web-server
Not all packages were installed.
Please try to install packages again later.
Please resolve this issue and try to install the packages again.
If you cannot resolve the issue on your own, contact product technical support for assistance.
- Login into the server via SSH;
- Re-run upgrade/update:
# plesk installer