has anyone dealt with 0x80a40019? my Xbox Series X can't sign in after a system update:

Can't connect to the server.
The server may be busy, or your network connection
may have been lost. Try again later.
Connection test: Internet Failed
The network test says Im connected to the internet, but the sign-in still fails. Im on a mobile hotspot. My profile picture just sits there with a spinner and then gives up. Id really like to avoid factory resetting, I have a lot installed.
Ive already tried the obvious stuff: restarting everything, checking cables, waiting an hour 😅 It still fails. What should I look at next?
