I have a similar error because ROG Live Service crashes on boot. After starting the service manually or setting start to automatic delayed it runs normally and AC won't show the error message.
Since the update, it doesn't work on the video card (Rx Vega), the aura and the armory are not even visible!!! In vain, I reinstall the armory or video card driver!!!
There's just been an update to the app version 5.4.10.0 and it has resolved the issue 🙂 Just navigate to Microsoft Store and update your Armoury Crate 🙂