Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Message" not found in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\mime\Email.php:25 Stack trace: #0 {main} thrown in D:\Apache24\www\trace\新建文件夹\Backstage\vendor\symfony\mime\Email.php on line 25