Nevermind. I figured it out. Thank you for your help and time.
I deactivated all my plugins and I still had the issue. Have any other tips?
Here is what the blank pop up looks like.
I tried it in different browsers. http://www.sarahhalstead.com/baby-milestone-cards-free-printable/
If you click on the download it shows a blank pop up. Then it goes away and just has a blank page.
It is supposed to take them to this page http://www.sarahhalstead.com/download/baby-milestone-cards/
And when you click download there the blank pop up comes again and downloads the file.