Through fiddling around, I have solved the problem and figured I would let you know. By clearing the marketplace cache, it solved the problem.
It only happens on one world. I would attach it, but do not know how.
I'm having the exact same problem with mine. It is only one world; I open it, and when I move around, it brings me to that error screen.
Through fiddling around, I have solved the problem and figured I would let you know. By clearing the marketplace cache, it solved the problem.