A UBOS container comes up degraded

/docs/users/faq-howto-troubleshooting/error-container-degraded/

Check which service(s) might have failed (see UBOS is in a "degraded" state).

If it is related to IPv6, make sure you have IPv6 enabled on your host even if you are not using it.

If you run the container on a UBOS host itself, it may be as easy as sudo ubos-admin setnetconfig client (or whatever netconfig you are running on the host).