Fatal error: Uncaught Error: Interface 'Symfony\Component\Mime\Encoder\ContentEncoderInterface' not found in /var/www/typo3/vendor/symfony/mime/Encoder/EightBitContentEncoder.php:17 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/mime/Encoder/EightBitContentEncoder.php on line 17