Fatal error: Uncaught Error: Class "Illuminate\Notifications\Messages\SimpleMessage" not found in D:\Apache24\www\baojie\back\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php:11 Stack trace: #0 {main} thrown in D:\Apache24\www\baojie\back\vendor\laravel\framework\src\Illuminate\Notifications\Messages\MailMessage.php on line 11