Are you referring to the "Map View" of the data when you query data? I just tried it in 3 different browsers (Chrome, IE, and Edge) and it did NOT work for me either. I would guess there is an issue with the server and since the government has been shut down they have not been able to maintain things. Good news, though, they should all be back to work today, so perhaps this will get working.
I would suggest clicking on the "Feedback" link at the upper right of the page and providing them with the details on your error. I'll do that as well so perhaps this issue will get resolved.
here is a link to a basic map of total pop by state that I tried to display and got the same results as you - just the base map and no data displayed. Legend says "no legend" (that's so not helpful!)
factfinder.census.gov/.../0100000US.04000