Fatal error: Uncaught Error: Class 'Symfony\Component\Mailer\Transport\AbstractTransport' not found in /var/www/typo3/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php:32
Stack trace:
#0 {main}
thrown in /var/www/typo3/vendor/symfony/mailer/Transport/Smtp/SmtpTransport.php on line 32