Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /home/o110635/public_html/scrappersgym.co.uk/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php:19 Stack trace: #0 {main} thrown in /home/o110635/public_html/scrappersgym.co.uk/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php on line 19