Fatal error: Uncaught Error: Class 'WP_REST_Controller' not found in /home/uiimedu/public_html/wpuiim2020/wp-includes.bak/rest-api/endpoints/class-wp-rest-plugins-controller.php:17 Stack trace: #0 {main} thrown in /home/uiimedu/public_html/wpuiim2020/wp-includes.bak/rest-api/endpoints/class-wp-rest-plugins-controller.php on line 17