After the previous update, my shield was completely unreachable for a week, with various trys at reconnecting. Here were the steps that finally got it working, I’m not sure which one was the important one.
1- logged off the nvidia shield, then linked shield to account via the plex.tv/link linking.
2- made sure that the server was running in the nvidia shield options(one time it reset and the server was stopped after)
3- connected to the machine via network as per comment #2 in:
After modifying storage location, server renamed to "localhost"
to rename the server back from localhost.
4- There was still a little weirdness, but eventually the libraries showed up again in the web app(a min or two after that change).
I also removed the old device from authorized devices, because it just “sticks” even though the same machine is renamed. I’m not sure when I did this step.