- Plesk for Linux
The website example.com was switched to Maintenance mode in Domains > example.com > My CMS.
The maintenance.php file was deleted manually in /var/www/vhosts/example.com/httpdocs/wp-content folder
The /wp-content/maintenance.php file is being re-created every time the WordPress Toolkit update task is running.
This is a WordPress Toolkit bug with ID EXTWPTOOLK-1901.
Currently, there is no workaround. The existing maintenance.php file does not affect the website.