502 at MRPI

MRPI downloading button at https://kindlemodding.org/jailbreaking/post-jailbreak/installing-kual-mrpi/ gives 502 Error, and since file at  https://www.mobileread.com/forums/showthread.php?t=225030 is not working on KT4 15.18.1, here's the snapshot of archived file https://web.archive.org/web/20251214170806/https://fw.notmarek.com/khf/kual-mrinstaller-khf.tar.xz