Fatal error: Uncaught Error: Class "Illuminate\Notifications\Messages\SimpleMessage" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php:11 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php on line 11