Fatal error: Uncaught Zend\ServiceManager\Exception\ServiceNotFoundException: Unable to resolve service "Mehrkanal\DwsErrorHandler\ErrorListener\GraylogErrorListener" to a factory; are you certain you provided it during configuration? in /web/htdocs/frd-dws-frontend/vendor/zendframework/zend-servicemanager/src/ServiceManager.php:687 Stack trace: #0 /web/htdocs/frd-dws-frontend/vendor/zendframework/zend-servicemanager/src/ServiceManager.php(763): Zend\ServiceManager\ServiceManager->getFactory() #1 /web/htdocs/frd-dws-frontend/vendor/zendframework/zend-servicemanager/src/ServiceManager.php(200): Zend\ServiceManager\ServiceManager->doCreate() #2 /web/htdocs/frd-dws-frontend/vendor/mehrkanal/dws-error-handler/src/Delegator/ErrorHandlerListenersDelegator.php(32): Zend\ServiceManager\ServiceManager->get() #3 /web/htdocs/frd-dws-frontend/vendor/zendframework/zend-servicemanager/src/ServiceManager.php(738): Mehrkanal\DwsErrorHandler\Delegator\ErrorHandlerListenersDelegator->__invoke() #4 /web/htdocs/frd-dws-frontend/vendor/zendfr in /web/htdocs/frd-dws-frontend/vendor/zendframework/zend-servicemanager/src/ServiceManager.php on line 687