I'm afraid that error is likely related to Itch itself or the apps your device will let you download. Sometimes there's compatibility problems with the app, however the game is only a zip file and can't stop itself from being downloaded straight from the browser no matter how many errors it potentially had in the game.
You can try using a different browser to download it or check your settings to see if certain apps are no long downloadable for your device. It seems there has been some kind of device-specific update that limits that for certain people. I'm sorry if it happened to you.