Fatal error: Uncaught Error: Class 'AC\Preferences\Site' not found in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\admin-columns\classes\ColumnSize\UserPreference.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\admin-columns\classes\ColumnSize\UserPreference.php on line 7