Private User - I don't know the details of the tree, but I am guessing that someone within the family circle (4th cousins in) wants the profile private. Despite the fact that the person is deceased and on the world tree, the family does have that right.
Perhaps send a message to the profile managers nicely requesting them to make it public.
I've sent the new manager Adam Charles Merlino of this abandoned tree a collaboration request, this will make things a lot easier to update and add sources from my side. I'm waiting for his reply.