Fatal error: Uncaught Error: Class 'Illuminate\Notifications\Messages\SimpleMessage' not found in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php:5 Stack trace: #0 {main} thrown in E:\xampp\htdocs\key1\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php on line 5