Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractMultipartPart" not found in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mime\Part\Multipart\MixedPart.php:19 Stack trace: #0 {main} thrown in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mime\Part\Multipart\MixedPart.php on line 19