Fatal error: Uncaught Error: Class "Illuminate\Notifications\ChannelManager" not found in C:\xampp\htdocs\gnu_7\g7\app\Notifications\NotificationChannelManager.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\gnu_7\g7\app\Notifications\NotificationChannelManager.php on line 15