Fatal error: Declaration of Macrocom\MacAbvkWebserviceMhkkuechen\Xclass\AbvkItemController::listAction() must be compatible with Macrocom\MacAbvkWebservice\Controller\AbvkItemController::listAction(): Psr\Http\Message\ResponseInterface in /var/www/clients/client47/web50/web/releases/74/packages/mac_abvk_webservice_mhkkuechen/Xclass/AbvkItemController.php on line 17