Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\Exception\ServiceUnavailableHttpException" not found in I:\www\frameworks\Laravel\vendor\laravel\framework\src\Illuminate\Foundation\Http\Exceptions\MaintenanceModeException.php:10 Stack trace: #0 {main} thrown in I:\www\frameworks\Laravel\vendor\laravel\framework\src\Illuminate\Foundation\Http\Exceptions\MaintenanceModeException.php on line 10