@nino.kozlevcar - this error has been addressed in the version 1.1 release. Are you using an older version of Veras, or are you using the latest v1.3.0.2?
Also this error message might show if your internet dropped while using the app, or if you are using a VPN. In this case opening and closing the app window should restore functionality. If this is the case, then we’d like to know more about your setup so we can create a patch.