Question on studio, audio codec and rating logos

Why are the studio, audio codec and rating logos not showing up? When using the web app and using my Shield TV Pro I dont see any logos at all. But when I look in the following folder on my PC they are all there!

C:\Program Files (x86)\Plex\Plex Media Server\Resources\Plug-ins-313f93718\Media-Flags.bundle\Contents\Resources

Any idea why they are not showing up???