I've never has any issues with Jay's site....ever. With all my many, many crazy posts, I'd have run into some issues but never have.
No true software expert here but...I'll venture it's your machine, browser, etc. In fact, if your machine (PC, laptop, pad) was initially loaded with Win 7 or Win 8 and you're now on Win 10, it's more likely its a Win 10 issue.
One easy way to tell: load or click on to Google's Chrome browser and open up this site. If all loads and works perfectly (as it should) it is either Win 10 or your older browser.