Fatal error: Uncaught Error: Class 'Illuminate\Support\ServiceProvider' not found in E:\xampp\htdocs\www\yunwei\qr251\vendor\dcat\laravel-admin\src\Extend\ServiceProvider.php:13 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr251\vendor\dcat\laravel-admin\src\Extend\ServiceProvider.php on line 13