Having same issue with Windows 7 served as well. After a recent update my TV Shows stopped loading metadata and images, deleted the library and reloaded, all that did is make it worse, tried manually fixing the matches and it tells me it can’t find a match on TVDB but when I go to the site it finds it no problem. Anyone know how to fix this it’s driving me nuts!
I too am having this issue with a new ubuntu server installation… frustrated beyond belief. The agents don’t even pretend to search, just instant fail.
I know this is an old thread but I wanted to share what finally worked for me. PlexPass running on Ubuntu 16.04. Deleting my library (in plex, not the actual video files) and re-adding it seems to have fixed this for me. I did do the above steps as well like deleting the bundle files which initially did nothing but I am unsure if that affected anything after adding back the library.