Fatal error: Uncaught Error: Class 'Symfony\Component\Workflow\Event\Event' not found in C:\xampp\htdocs\plugins\Symfony\Component\Workflow\Event\CompletedEvent.php:18
Stack trace:
#0 {main}
thrown in C:\xampp\htdocs\plugins\Symfony\Component\Workflow\Event\CompletedEvent.php on line 18