Fatal error: Uncaught Error: Class "WP_REST_Posts_Controller" not found in C:\xampp\htdocs\wp-includes\rest-api\endpoints\class-wp-rest-attachments-controller.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-includes\rest-api\endpoints\class-wp-rest-attachments-controller.php on line 17