Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractMultipartPart" not found in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/mime/Part/Multipart/RelatedPart.php:20
Stack trace:
#0 {main}
  thrown in /usr/home/jiexusheng/domains/linuxdo.isgre.at/public_html/vendor/symfony/mime/Part/Multipart/RelatedPart.php on line 20