Audio Devices not found Found

Roon Core Machine

Nucleus core

Networking Gear & Setup Details

Description of Issue

BTSmart Hub.Connected to Nucleus via Ethernet.Aries G1endpoint plus other endpoints eg tablets, phone, Sonos etc.
I keep on getting the message No Audio Devices Found in the manage Audio Devices section.I can see all the endpoints and they are enabled and configured.I have tried restarting my router and Nucleus Core. I have logged out of Roon and the Core.I can see the Nucleus Core on my network as well as my AriesG1.I Can access both of their Uis on the network.I can also still use ARC.All appears fine.I can normally sort these things out but have run out of options.One suggestion is to generate a new RAAt Server by deleting the file and creating a new file.That seems fairly drastic….any other suggestions before I take this route. Thanks