"... Please try again."
But that's only after the action I asked for happens. To be clear, I say "Hey Siri, please turn off the bookcase." and Siri immediately turns it off and immediately responds with that. This only happens with HKB stuff. My Nanoleafs are HomeKit enabled and Siri doesn't get them wrong.
Any idea what I should reboot? This happened with no particular changes, aside from my recent removal of a non-functionining Homebridge-Camera bridge from HomeKit.