Jitai (wanikani alternative fonts) not working - page I'm supposed to be downloading it on isn't opening

I’ve been unsuccessful in trying to install Jitai on my computer so I can see my reviews on my computer in different fonts (Tsurukame does a wonderful job of this on my iphone but I’d love the script when I’m doing computer reviews).

I am using chrome, if that makes a difference.

And I have Tampermonkey installed.

https://openuserjs.org/scripts/obskyr/Jitai