Fatal error: Uncaught Error: Class "Illuminate\Support\Manager" not found in D:\programs\xampp\htdocs\backend-test\vendor\laravel\framework\src\Illuminate\Foundation\MaintenanceModeManager.php:7 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\backend-test\vendor\laravel\framework\src\Illuminate\Foundation\MaintenanceModeManager.php on line 7