I tried downloading the file and it worked fine for me, so I imagine you're simply having an issue downloading the files. I'd make sure you have enough free space on your drive and perhaps try downloading it from a different browser.
If that doesn't work, maybe it could be that your connection is patchy and fails halfway through a download. I'd try connecting via ethernet cable instead of using wifi.
These are just somewhat educated guesses, and I could be way off the mark, but I hope they help.