Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Queue\ShouldQueue" not found in /home/lessonplannercom/public_html/backend/vendor/illuminate/notifications/SendQueuedNotifications.php:14 Stack trace: #0 {main} thrown in /home/lessonplannercom/public_html/backend/vendor/illuminate/notifications/SendQueuedNotifications.php on line 14