So I am trying to add my wife to the Siri integration for my Smart Bridge. I tap +Add User, put in her ICloud email address, then tap Add user, it immediately pops up "Unable to add new user" We have turned on and off both of our ICloud Keychains, turned on and off the home kit, reset homekit settings... Everything I can find online. I've tried other emails she has associated with various Apple this-n-thats, and it will always say "the invitation was declined"... If we use the ICloud email (as is required), we get the "unable to add new use" error. I just recently completely reset our whole system due to a problem after adding a new device, and it had all worked fine with the Siri integration for both of us before... What gives!?