Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Header\AbstractHeader" not found in /home13/settlepos/restaurant.settlepos.com/vendor/symfony/mime/Header/MailboxHeader.php:22 Stack trace: #0 {main} thrown in /home13/settlepos/restaurant.settlepos.com/vendor/symfony/mime/Header/MailboxHeader.php on line 22