It means that the interface is down. I'm not on 23.10.1.3 yet but I'd assume it's a bug that they did not fix it yet. Network reporting was problematic in Cobia, there have been some fixes though. Check the announcement thread here in the forums.
I don't have a link at hand, you'd need to check Jira if someone already reported that bug. If everything is working with that interface it's just that, a bug in display.