I have heard that whenever you put the quantum theory with general relativity and gravity together, the force?

Question

I have heard that whenever you put the quantum theory with general relativity and gravity together, the force between two gravitons becomes infinite, but how? why?

Answer 1

Because there is either something wrong with quantum theory, or something wrong with general relativity theory. Both have stood up to experiment countless times, but whenever you encounter infinity in an equasion, it means there is a flaw in the theory. If they can solve it, they will be able to tell what happens at the singularity of a black hole, for instance, because it requires both quantum theory and general relativity theory to resolve it. The reason is because it's a very small region, involving quantum physics, and a region of very high gravity, requiring general relativity.