I had the same issue this that site. I think it is caused by ad block. I browse the internet with Firefox that have ad blocking addons installed, but always have Chrome installed without any adddons to test sites just in case. And on chrome it worked OK.
I suppose it’s a bit of a “hoop,” but what I use to download files with curl, aria2, or wget is a Firefox add-on “cliget” (I’m not sure if there’s a Chrome version). You click a link in the browser to download, and it generates a command for these programs to emulate a browser download. I don’t use it all the time, but I do for large files or slow downloads. Since these programs are CLI-based, I can run them on my server and let them work for as long as needed.
I guess it’s still not an option for people who download a lot using direct downloads, but still just putting it out there as an option for people like me.