Fatal error: Uncaught Error: Interface 'AC\Registerable' not found in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\addons\bbpress\classes\Service\Columns.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\admin-columns-pro\addons\bbpress\classes\Service\Columns.php on line 9