Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\TextPart" not found in D:\Apache24\www\dls\back-end\vendor\symfony\mime\Part\DataPart.php:21 Stack trace: #0 {main} thrown in D:\Apache24\www\dls\back-end\vendor\symfony\mime\Part\DataPart.php on line 21