Fatal error: Uncaught Error: Class "Sylius\Component\Mailer\Sender\Adapter\AbstractAdapter" not found in /home/flighto/e-commerce/vendor/sylius/mailer-bundle/src/Bundle/Sender/Adapter/DefaultAdapter.php:21 Stack trace: #0 {main} thrown in /home/flighto/e-commerce/vendor/sylius/mailer-bundle/src/Bundle/Sender/Adapter/DefaultAdapter.php on line 21