Hey drnebula. The file is about 72MB so maybe that has something to do with it. I would contact itch.io support for this one. On my end, I can fine from itch even when not logged in (I haven't tried sidequest yet, but the sidequest dashboard reports that it is being downloaded by folks). Also check your internet restrictions, like if you're in a country that doesn't allow this sort of thing or maybe there's parental restrictions left on or something.