That was my first thought as well. I get reports of this every now and then, usually its a bad download, redownloading sorts it out. Getting several of the same report together might be a coincidence. Hopefully anyway, because they're fresh uploads and I checked if they unpack correctly. I don't really know what else I would do to address it.I used the GoFile link in OP, and 7Zip.
It's likely they either had a bad download, or whatever archive tool they use needs updating.