Guys, would permissions issues cause that? Does Plex have write access to your /Plex Media Server/Plug-in Support/Preferences directory?
I saw in another thread you verified plex:plex has access to Plug-ins directory, but didn't mention verifying others.
That was the first suspicion I had, but sadly a recursive chown of the whole plexmediaserver dir didn't help. :(
Just for the record, by that I mean:
sudo chown -R plex:plex /var/lib/plexmediaserver && sudo service plexmediaserver restart
I'm especially weirded out by the fact that all other parts of channels (official and not) seems to be working great. It's just the preferences that isn't loading.
Do you guys know of any other part of Plex that renders up the same kind of "popup preference" box? If I can reproduce with a non-channel feature in PHT then I guess it's a wider problem with the client and not the server.