Preview problem

Trying to set up memorials to deceased classmates st Sayvillealumni.com Your plugin would be perfect! But, i just can’t get it to work despite multiple attempts… I never get a preview. I sent a link example of one page — perhaps it’s the website? Oddly, posting a link in Facebook works perfectly. Can you take a peek please and let me know what I am doing wrong? Thanks so much!

The page I need help with: [log in to see the link]