Fatal error: Uncaught Error: Class "Illuminate\Queue\Queue" not found in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Queue/DatabaseQueue.php:21 Stack trace: #0 {main} thrown in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Queue/DatabaseQueue.php on line 21