Fatal error: Uncaught Error: Class 'Illuminate\Notifications\Messages\SimpleMessage' not found in /var/www/html/magnum-backoffice-master/vendor/laravel/framework/src/Illuminate/Notifications/Messages/MailMessage.php:10 Stack trace: #0 {main} thrown in /var/www/html/magnum-backoffice-master/vendor/laravel/framework/src/Illuminate/Notifications/Messages/MailMessage.php on line 10