Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Queue\ShouldQueue" not found in /home/deborapsol/laravel/vendor/laravel/framework/src/Illuminate/Queue/CallQueuedClosure.php:13 Stack trace: #0 {main} thrown in /home/deborapsol/laravel/vendor/laravel/framework/src/Illuminate/Queue/CallQueuedClosure.php on line 13