Fatal error: Uncaught Error: Class 'Dcat\Admin\Widgets\Widget' not found in E:\xampp\htdocs\www\qr250\vendor\dcat\laravel-admin\src\Widgets\Tree.php:9 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\qr250\vendor\dcat\laravel-admin\src\Widgets\Tree.php on line 9