Fatal error: Uncaught Error: Class "Illuminate\Broadcasting\Channel" not found in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Broadcasting/PresenceChannel.php:5 Stack trace: #0 {main} thrown in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Broadcasting/PresenceChannel.php on line 5