Fatal error: Uncaught Error: Class "WP_REST_Controller" not found in /www/wwwroot/xk-sport.ai/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php:17 Stack trace: #0 main thrown in /www/wwwroot/xk-sport.ai/wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php on line 17