Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractApiTransport" not found in /opt/lampp/htdocs/msjso/vendor/symfony/postmark-mailer/Transport/PostmarkApiTransport.php:32 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/msjso/vendor/symfony/postmark-mailer/Transport/PostmarkApiTransport.php on line 32