Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in D:\Apache24\www\trace\新建文件夹\Backstage\app\Http\Controllers\TestController.php:7 Stack trace: #0 {main} thrown in D:\Apache24\www\trace\新建文件夹\Backstage\app\Http\Controllers\TestController.php on line 7