Fatal error: Uncaught Error: Class "Symfony\Component\Workflow\Event\Event" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\workflow\Event\GuardEvent.php:24 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\workflow\Event\GuardEvent.php on line 24