Fatal error: Uncaught Error: Interface "Symfony\Component\Workflow\Validator\DefinitionValidatorInterface" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\workflow\Validator\StateMachineValidator.php:20 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\workflow\Validator\StateMachineValidator.php on line 20