Can't access demo site

I have a problem regarding missing submenu for choosing custom PDF Template when I go to Print to PDF. I wanted to check if the same issue occurs on demo site but can’t access with my existing login credentials nor with newly created account (Safari, Firefox, same result…). Here’s what I get when I click on “Log in to Demo” button:

Is there a known issue with demo site or it’s something on my side (browser, OS, something else…)?