I was googling for some quite a bit, and nothing much was helpful. So the issue, let’s say you are simulating a skeletal asset with some kinematic sub-objects. But keep getting that error (a tick warning actually) though everything is set supposedly fine. A vehicle in my case, where the root (a car body) is simulated, but the wheels are kinematic. The problem was in the Physics Transform Update Mode in the mesh component in the car’s blueprint. The problem goes away if the option is changed to the “Transform is Kinematic”. But then it adds another problem, since it’s normally having the springarm and camera components attached. The workaround is to attach the springarm to the root socket.
And a question. It is a bug, or i’m missing something?