Fatal error: Uncaught Error: Class "Illuminate\Notifications\Messages\SimpleMessage" not found in D:\xampp\htdocs\dropifypro\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php:13 Stack trace: #0 {main} thrown in D:\xampp\htdocs\dropifypro\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php on line 13