Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in D:\Apache24\www\xy_yaojian\backstage\app\Http\Controllers\Code\IDCCodeFileController.php:14 Stack trace: #0 {main} thrown in D:\Apache24\www\xy_yaojian\backstage\app\Http\Controllers\Code\IDCCodeFileController.php on line 14