To use Czar, please make sure you are running WordPress 4.6 or higher, PHP 5.6 or higher, and MySQL 5.6 or higher. We have tested it with Mac, Windows, and Linux. Below is a list of items you should ensure your host can comply with.
PHP version 5.5 or greater
MySQL version 5.0.15 or greater or any version of MariaDB
(Recommended) (Required for Multisite) Apache mod_rewrite module (for clean URIs known as Permalinks)