It is now working. I contacted Tech Support (see below), they must have fixed it. Thanks to all.
Thank you for contacting Genealogy.com Technical Support.
I didn't preform a search I just went directly to the Family Page or Census. However when I attempted a search and found results listed in the Family Book and 1850 Census for the Genealogy Library and then clicked on the match I got the error you are getting. I have forwarded this on the web engineers and I hope they can resolve this soon. I am sorry for the mix-up.