[Zubersoft]

Windows has a security restriction for UWP applications that does not let them communicate with another application on the same device using the network. So this stops the companion app from connecting to MobileSheets if they are both running on the same device. There is no way around this unfortunately. Having said that, you really shouldn't need to use the companion app for anything if MobileSheets is running on your Windows 10 device. It has all of the same capabilities as the companion app and far more you can access.

Mike