Try Settings > [Plex Web | Plex for Windows | Plex for Mac] > Debug > Restore Defaults.
This will reset the customizations of the client – not your server and IIRC should also fix the broken collection tab.
Try Settings > [Plex Web | Plex for Windows | Plex for Mac] > Debug > Restore Defaults.
This will reset the customizations of the client – not your server and IIRC should also fix the broken collection tab.