Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /home/shineqat/public_html/wp-content/plugins/ml-slider/metagallery/app/APIRouter.php:17 Stack trace: #0 {main} thrown in /home/shineqat/public_html/wp-content/plugins/ml-slider/metagallery/app/APIRouter.php on line 17