Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractMultipartPart" not found in /home/kartulirest/public_html/xyz.kartulirest.de/vendor/symfony/mime/Part/Multipart/DigestPart.php:20 Stack trace: #0 {main} thrown in /home/kartulirest/public_html/xyz.kartulirest.de/vendor/symfony/mime/Part/Multipart/DigestPart.php on line 20