Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Exception\TransportException" not found in /home/zdpktgd/ptc/vendor.old/symfony/mailer/Exception/UnexpectedResponseException.php:14 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/symfony/mailer/Exception/UnexpectedResponseException.php on line 14