"Buy Now" option frozen

I downloaded the Adobe Acrobat XI trial about one year ago.  After using it for the 30 day period, I did not opt to purchase.  However, one year later (now), I would like to use the program and am ready to pay the monthly fee.  However, when I hit the "Buy Now" button, a new screen opens that is blank: https://www.acrobat.com/landing/en/acrobat-trial.html

Any help with this?