I've never heard of that error before. What OS are you running? Are you updating via the Itch Launcher or are you downloading the full update file from the links above?
I use the one for Android, and I tried both links from itch.io and your patreon but both failed. I can only upgrade the game when I delete the old version and then download the new version, luckily my save file is still there so I don't have to start from the beginning.
Sounds like you don't have enough storage space. Android can require up to five times as much space as the app takes up to install it, so you usually need at least 10GB+ free storage on your device to install CK :P
