Fatal error: Uncaught Error: Class "Illuminate\Support\Manager" not found in /opt/lampp/htdocs/msjdocmanagement/vendor/laravel/framework/src/Illuminate/Notifications/ChannelManager.php:13 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjdocmanagement/vendor/laravel/framework/src/Illuminate/Notifications/ChannelManager.php on line 13