Long story short, you should be able to download it now.
The file wasn't on the server, but as Terry said the creator had apparently uploaded the same file not long before entering it into the Build It competition. That download was hidden from view but the file for that download was on the server.
The file wasn't on the server, but as Terry said the creator had apparently uploaded the same file not long before entering it into the Build It competition. That download was hidden from view but the file for that download was on the server.