It appears Virtualmin struggles when you have both 5.6 and 7.2 PHP version and you’re trying to use PHP-FPM. A typical error might read:
Restarting PHP-FPM server ..
.. failed : Job for php-fpm.service failed because the control process exited with error code. See “systemctl status php-fpm.service” and “journalctl -xe” for details.
At this point there is no clear way of solving the problem. If you have found one, please email us at [email protected] so that we can add it to our knowledgebase.