@Bradford_Card, can you connect to the web interface of your Nucleus Plus (I believe so as you can reset and reinstall software on it)? Can you post a screenshot of this page? Also, do you know what version of Roon is running on the Nucleus Plus and what version is running on your Mac remote?
Thanks for your patience while we work through each thread. I wanted to check in on this issue to see if you were able to get your Remotes reconnected to your Core?
I see that all your devices are on 2.0, which is a good sign.
Did you try connecting with a completely fresh database, before restoring from a backup? I’d be curious to see if this changes connectivity for you.