The Hue NS quit working when I moved from PG2 to PG3. I believe the root cause was a concurrent LAN ip range change from 192.168.xxx to the 10.0.xxx. That change was unrelated to home automation but seems to have uncovered a problem that several others have noticed. The PG3 NS cannot find the Hue bridge if you make any router changes. I forced the Eero router back to the 192.168.xxx range, factory reset the Hue hub, verified that meethue.com is communicating with the hub, and then reinstalled th