Fatal error: Uncaught Error: Class "Illuminate\Queue\Queue" not found in /opt/lampp/htdocs/appproject/vendor/laravel/framework/src/Illuminate/Queue/DatabaseQueue.php:17 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/appproject/vendor/laravel/framework/src/Illuminate/Queue/DatabaseQueue.php on line 17