Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in D:\xampp\htdocs\_runing\sales-manager-system\vendor\laravel\framework\src\Illuminate\Routing\RoutingServiceProvider.php:18 Stack trace: #0 {main} thrown in D:\xampp\htdocs\_runing\sales-manager-system\vendor\laravel\framework\src\Illuminate\Routing\RoutingServiceProvider.php on line 18