Pages suddenly not communicating with Monome

After using an older 64 monome with Pages with no issues now I can’t get it to work. It still works on an older computer, so I don’t think it is an issue with the monome itself. When I “discover devices” it will show up, but doesn’t display the “add” button. Any ideas on what to try next? I’ve repaired disk permissions and reset laptop a number of times.

Now I’ve found that it works if I have WiFi on, but stops working if I turn WiFi off. Why would that be?