Plesk upgrade produces error: Job for httpd.service failed because the control process exited with error code. See “systemctl status httpd.service” and “journalctl -xe” for details.
See: https://support.plesk.com/hc/en-us/articles/115002784134-Web-server-reconfiguration-fails-on-Debian-Ubuntu-with-Plesk-Curl-failed-Timeout-was-reached