Can't connect to Plex server

I have a Plex server running on my local network. After I input the Plex link token into Infuse, the connection spins for a while and fails with “an error occurred”. I already have secure connections disabled on the Plex server and MrMC running on the same Apple TV connects just fine. Any suggestions?

If you have a chance, can you send in a quick report from your Apple TV and open a support ticket so we can look further into this?

This was my fault I think. I was running Plex in a Docker container and used bridged networking instead of host mode networking. It seems to work with host mode, not so much with bridged.