Fatal error: Uncaught Error: Interface 'Symfony\Component\Mailer\Transport\Smtp\Auth\AuthenticatorInterface' not found in E:\xampp\htdocs\www\yunwei\qr250\vendor\symfony\mailer\Transport\Smtp\Auth\CramMd5Authenticator.php:21 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\yunwei\qr250\vendor\symfony\mailer\Transport\Smtp\Auth\CramMd5Authenticator.php on line 21