Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Part\AbstractMultipartPart' not found in /home/devmecseminars/public_html/mec/vendor/symfony/mime/Part/Multipart/FormDataPart.php:24 Stack trace: #0 {main} thrown in /home/devmecseminars/public_html/mec/vendor/symfony/mime/Part/Multipart/FormDataPart.php on line 24