Current work around is to click the link directly from the webpage source code (hover over link, right-click, select 'inspect' ... click on the link after "href=".
Or to right-click the link and select 'copy link address' and post that in browser URL address bar.
https://security.googleblog.com/2019/10/no-more-mixed-messages-about-https_3.html "https:// pages can only load secure https:// subresources. " is preventing the 1-click download links, since they use http and Github uses https (if I understand correctly). Updated links to https. Working as intended in my fork.
Current work around is to click the link directly from the webpage source code (hover over link, right-click, select 'inspect' ... click on the link after "href=". Or to right-click the link and select 'copy link address' and post that in browser URL address bar.