Fatal error: Uncaught Error: Class 'Illuminate\Support\ServiceProvider' not found in C:\xampp73\htdocs\web\vendor\laravel\framework\src\Illuminate\Queue\QueueServiceProvider.php:21 Stack trace: #0 {main} thrown in C:\xampp73\htdocs\web\vendor\laravel\framework\src\Illuminate\Queue\QueueServiceProvider.php on line 21