Having the same problem on my LG TV.
It started as a still PLEX loading screen leading to a -337 error code from my TV (“Check network connection”, like here). Then I disabled IPv6 and changed my DNS to 8.8.8.8 and it worked… once!
Then I tried to start Plex again and boom! “Network Unavailable” from Plex app and nothing I can do about it…
I can’t count the amount of posts about this same issue with WebOS’ Plex app… Why don’t Plex do anything about it?
