Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Part\AbstractMultipartPart' not found in D:\xampp7\htdocs\www\nbkm\show_sr\vendor\symfony\mime\Part\Multipart\MixedPart.php:19 Stack trace: #0 {main} thrown in D:\xampp7\htdocs\www\nbkm\show_sr\vendor\symfony\mime\Part\Multipart\MixedPart.php on line 19