At this moment I managed to get the second nest protect added to my
account by setting up a second home in the nest app, so at least I can
use it now, but I do not consider this a solution.I'm not even sure they
are linked together in any way now, so...
I have the exact same problem, very annoying. First one works fine, the
second one keeps saying it cannot be added to my account at this moment
and to try again in a few hours. Error P009 (0.80)