You cannot download thumbnails from http://thumbnailpacks.libretro.com/. It says that the bandwidth has exceeded the total amount. Also when going to Thumbnails updater on lakka, nothing is shown. With all of this said, I have a gigabit ISP connection and would be more than happy to seed a torrent if that is fine.
Yes, our server exceeded its bandwidth allotment. It’ll be fixed with the next update.