Connecting to unsecured endpoint results in ClientError::UnknownError

QOpcUaClient::errorChanged

UnknownError

switch (m_connectionSettings) {
      case EndpointConnectionSettings::Default: {
         if (endpoints.size())
            m_client->connectToEndpoint(endpoints
                    .first());  // Connect to the first endpoint in the list
         break;
      }
      case EndpointConnectionSettings::Unsecure: {
         for (QOpcUaEndpointDescription& epd : endpoints) {
            // Connect to the unsecured endpoint
            if (epd.securityMode() ==
                    QOpcUaEndpointDescription::MessageSecurityMode::None &&
                epd.securityPolicy().contains("None")) {
               m_client->connectToEndpoint(epd);
               break;
            }
         }
         break;
      }
      default: qWarning() << u"Unknown EndpointConnectionSetting"_s;
   }