Fatal error: Uncaught Error: Class "WP_List_Table" not found in /var/www/vhosts/awxpokmt.host213.checkdomain.de/htdocs/playground/wordpress/wp-admin/includes/class-wp-ms-users-list-table.php:17 Stack trace: #0 {main} thrown in /var/www/vhosts/awxpokmt.host213.checkdomain.de/htdocs/playground/wordpress/wp-admin/includes/class-wp-ms-users-list-table.php on line 17