Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /nfs/aesop1/hw00/d47/neurogrd/wordpress/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php:19 Stack trace: #0 {main} thrown in /nfs/aesop1/hw00/d47/neurogrd/wordpress/wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php on line 19