Here are the system requirements you need in order to use Bookit and avoid any technical issues. If you are not sure whether your server supports this, contact your host.
WordPress 4.6 or Greater Bookit works with WordPress version 4.6 or greater (WordPress 5.5 or greater is recommended).
PHP 7.2 or Greater
MySQL 5.6 or Greater MySQL version 5.6 or greater OR MariaDB version 10.0 or greater (MySQL is preferred).
WP Memory Limit WP Memory limit of 128 MB or greater (256 MB or higher is preferred).