Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/.sites/114/site713/web/energiepackung2024/vendor/shopware/core/Content/Newsletter/Event/NewsletterConfirmEvent.php:20
Stack trace:
#0 {main}
  thrown in /home/.sites/114/site713/web/energiepackung2024/vendor/shopware/core/Content/Newsletter/Event/NewsletterConfirmEvent.php on line 20