Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Part\AbstractPart" not found in C:\xampp\htdocs\slip\laravel-webhooks\vendor\symfony\mime\Part\AbstractMultipartPart.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\slip\laravel-webhooks\vendor\symfony\mime\Part\AbstractMultipartPart.php on line 19