Fatal error: Uncaught Error: Class "WP_REST_Controller" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/routes/siteorigin-widgets-resource.class.php:5 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/routes/siteorigin-widgets-resource.class.php on line 5