Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in H:\root\home\agubski-002\www\alexgubski\blog\wp-includes\rest-api\endpoints\class-wp-rest-sidebars-controller.php:19 Stack trace: #0 {main} thrown in H:\root\home\agubski-002\www\alexgubski\blog\wp-includes\rest-api\endpoints\class-wp-rest-sidebars-controller.php on line 19