Fatal error: Uncaught Error: Class "Illuminate\Support\Manager" not found in D:\Apache24\www\sanqi\back-end\vendor\laravel\framework\src\Illuminate\Notifications\ChannelManager.php:12 Stack trace: #0 {main} thrown in D:\Apache24\www\sanqi\back-end\vendor\laravel\framework\src\Illuminate\Notifications\ChannelManager.php on line 12