Create a rolling ball controller (top-down like "Waves")? Example included.

Hello there, I’m having severe problems with my attempts to create this, for some reason if I enable gravity and the simulate physics on the mesh, the mesh itself will disappear, but if I remove the sphere collision that is at the top of the stack in the components, the mesh will appear and fall, but it will obviously not collide with anything despite the fact that the static mesh has sphere collider in the static meshes settings. I have tried setting an empty static mesh at the top of the component stack as well but that has the same results.