I just ran into this same issue when testing chaos vehicles. What is the parent class of your actor with the Vehicle Movement Component?
In my case, I had followed the vehicle template project and started with an actor w/parent class of Wheeled Vehicle Pawn but it wouldn’t allow access Set Drive Torque and other related functions, just as you experienced.
Creating a new actor w/ Pawn parent class then, adding a ChaosWheeledVehicleMovement component worked.
