Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\swiftmailer-bundle\DependencyInjection\SwiftmailerExtension.php:31 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\swiftmailer-bundle\DependencyInjection\SwiftmailerExtension.php on line 31