"inertia tensor" error when I add rigidbody to player

When I add rigidbody to player, I get this error. I haven’t seen it before, and I don’t know what to do.

Actor::updateMassFromShapes: Compute mesh inertia tensor failed for one of the actor’s mesh shapes! Please change mesh geometry or supply a tensor manually!

I do not have a mesh collider in the object. It has a box collider.

Actually, it is just a plain capsule, with a placeholder flashlight in his hand. !