I can't do anything about you being unable to extract the archives.

I'm hosted by OVH and everything works for pretty much everyone.

It's a problem with your browser, ISP, computer, home network, etc.

Before you e-mail me about how it doesn't work, check the file size of your
downloaded file vs. the one displayed on the web page. If it doesn't match,
you found your issue. (and it's not coming from my side!)

You could try downloading the file on another computer and see if it helps.
Or from your smartphone on a 3G connection. I dunno.

You'll have to figure it out yourself. Sorry!