Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\uvdesk\core-framework\SwiftMailer\Event\ConfigurationUpdatedEvent.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\uvdesk\core-framework\SwiftMailer\Event\ConfigurationUpdatedEvent.php on line 12