I've got the same issue. If you look on GitHub it tries to pull them from https://wifipineapple.com/?downloads&list_infusions&mk5 but if you try to go to this on your browser you get a wonderful 404 error.
(GitHub blob: https://github.com/WiFiPineapple/MK5_Interface/blob/5c34b68000262ee4ba92793efef215a80b220372/components/system/bar/files/downloader )