Fatal error: Uncaught Error: Interface 'Symfony\Component\Mailer\Transport\TransportInterface' not found in /var/www/typo3/vendor/symfony/mailer/Transport/RoundRobinTransport.php:25 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/mailer/Transport/RoundRobinTransport.php on line 25