Fatal error: Uncaught Error: Class 'Illuminate\Support\Manager' not found in D:\xampp\htdocs\vendor\laravel\framework\src\Illuminate\Notifications\ChannelManager.php:12 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vendor\laravel\framework\src\Illuminate\Notifications\ChannelManager.php on line 12