Fatal error: Uncaught Error: Class 'AC\Integration' not found in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\admin-columns\classes\Integration\MetaBox.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\admin-columns\classes\Integration\MetaBox.php on line 10