I have a Nexus 9 tablet that I want to use as a remote. I installed Roon Remote app, but when I started the app it keeps trying to connect to my core but the keeps failing to connect. I have rebooted both core and tablet with no effect. In the Audio section of Roon Settings it is not showing as a “Network Device”. The core is a Windows 10 PC and the Nexus is running Android 7.1.1. Any suggestions?