Plex randomly started telling me I need the remote pass

Server Version#: most recent
Player Version#: most recent

I’ve been using Plex for years. And I’ve had little issue with it .

It has decided to randomly claim I need the remote watch pass to watch stuff on my PC, that is connected to the same WiFi as my television.

Absolutely nothing has changed. Zero.

Why is it not recognising my PC and TV as being on the same local network? I am able to watch stuff through the native Windows Media Server. I prefer using Plex for the interface etc.

How is your local network numbered and what are your DNS servers configured for these clients?

I don’t know either of these.