Fatal error: Uncaught Error: Class "Illuminate\Notifications\Messages\SimpleMessage" not found in /srv/www/sites/public/starter-cms/vendor/laravel/framework/src/Illuminate/Notifications/Messages/MailMessage.php:11 Stack trace: #0 {main} thrown in /srv/www/sites/public/starter-cms/vendor/laravel/framework/src/Illuminate/Notifications/Messages/MailMessage.php on line 11