Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractMultipartPart" not found in /home/app/htdocs/truebits.docker.installations/invoice-crater/docker.app/crater/vendor/symfony/mime/Part/Multipart/AlternativePart.php:19 Stack trace: #0 {main} thrown in /home/app/htdocs/truebits.docker.installations/invoice-crater/docker.app/crater/vendor/symfony/mime/Part/Multipart/AlternativePart.php on line 19