ServiiGo is a third party app, and not supported by the Serviio developer. It is a great app, but the person responsible for it has not fully updated it yet for Serviio 2.0. Since Serviio 2.1 was recently released, he might have additional areas to test and perhaps update.
Please see this thread for ServiiGo support:
viewtopic.php?f=17&t=6803