Fatal error: Uncaught Error: Class 'Illuminate\Notifications\Messages\SimpleMessage' not found in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php on line 10