Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in D:\Apache24\www\sciegen\backend\vendor\symfony\mailer\Transport\Smtp\SmtpTransport.php:33 Stack trace: #0 {main} thrown in D:\Apache24\www\sciegen\backend\vendor\symfony\mailer\Transport\Smtp\SmtpTransport.php on line 33