Fatal error: Uncaught Error: Class "WP_REST_Controller" not found in C:\Apache24\htdocs\wp-includes\rest-api\endpoints\class-wp-rest-sidebars-controller.php:19 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\wp-includes\rest-api\endpoints\class-wp-rest-sidebars-controller.php on line 19