Fatal error: Uncaught Error: Class "WP_REST_Controller" not found in /home/.sites/38/site25/web/wp-includesXX/rest-api/endpoints/class-wp-rest-url-details-controller.php:18 Stack trace: #0 {main} thrown in /home/.sites/38/site25/web/wp-includesXX/rest-api/endpoints/class-wp-rest-url-details-controller.php on line 18