I connected two Play 3 speakers to an existing Sonos Amp system, all are S2. The speakers were purchased together, one updated fine, the other did not and will not. Things I have tried based on similar problems found in the community:
-Connect the speaker via ethernet cable
-Connect the speaker directly to the router
-Reboot the router
-Factory reset the speaker
-Disconnect the working Play 3, factory reset again, try adding again (same error)
All are on the same network. Diagnostics 832690832
Edit: I have also used a static address and using DNS of 1.1.1.1, 8.8.8.8
Thank you