Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /sites/izyparkm/public_html/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php:19 Stack trace: #0 {main} thrown in /sites/izyparkm/public_html/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php on line 19