Fatal error: Uncaught Error: Class 'Symfony\Contracts\EventDispatcher\Event' not found in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Integration/Internal/Framework/Event/TestEvent.php:11 Stack trace: #0 {main} thrown in /www/shop/vendor/oxid-esales/oxideshop-ce/tests/Integration/Internal/Framework/Event/TestEvent.php on line 11