I have installed Plex several times in the past and never had an issue but this time I can't seem to get things to work. I have a server with a fresh install of Ubuntu 16.04 and I have tried 4 times now to install latest Plex on it. Every time the package installation goes perfectly but the problem starts when I access the web interface for the first time.
I connect to the server from another machine in Chrome (http://192.168.x.x:32400/web) and am provided with the How Plex Works then Server Setup page. I enter a name for the server, click next, then get an error popup telling me my settings could not be saved. Doesn't matter how many times I try, or uninstall/reinstall I get the same thing.
I noticed in Chrome developer tools it is trying to make requests to 127.0.0.1 which doesn't make sense since I'm not on the Plex server so I went ahead and created an ssh tunnel and forward port 32400 to the Plex server. Doing this breaks the setup page and prevents me from even entering a name. Through a combination of using the tunnel and server's IP I can finally get to the settings page where it tells me I have an unclaimed server on my network. When I try to claim the server through the tunnel it errors out and tells me I can't. If I use the servers actual IP to claim it, the server disappears and can no longer be found on my network.
I'm at a loss here of what to do next.