Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractMultipartPart" not found in A:\risk_server\project\hr-server\vendor\symfony\mime\Part\Multipart\AlternativePart.php:19 Stack trace: #0 {main} thrown in A:\risk_server\project\hr-server\vendor\symfony\mime\Part\Multipart\AlternativePart.php on line 19