Can't create or edit libraries

I have set up a media server on my new Shield TV. However, when I go to create or edit libraries I just get a loading circle that goes on indefinitely. Any advice?

Solved. Was a strange problem, here are the steps in case others have the same issue:

  1. Changed language to English US.
  2. Opened Storage and reset settings on shield and changed ‘Transfer files over local network’ to on.
  3. Opened plex on computer and claimed server, was able to add libraries thereafter.