UE4 Vehicle Not Working But UE5 Works

So I’m adding cars to my game by using the WheeledVehiclePawn class with the Chaos Vehicle plugin active in UE4.27 but It would not work when I tried adding my own models + I used the example project and added my own models and it still did not work. [I CHANGED THE PHYSICS ASSET]

I swapped over to UE5.1 to test out new features and when I created a new project with the Vehicle Template and added my own model + changed the physics asset. It works fine.

I would switch directly over to UE5 but some plugins Im using and most of my workflow is in UE4 so is there a fix / work-around?