Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in /home/zdpktgd/ptc/vendor.old/symfony/mailer/Transport/Smtp/SmtpTransport.php:33 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/mailer/Transport/Smtp/SmtpTransport.php on line 33