WheeledVehicle floats and doesn't move

I’m trying to use a custom model made in Blender with the WheeledVehicle system in UE4.26. Everything is setup according to the Vehicle Art Setup and Vehicle User Guide on the documentation.

The car does have gravity and Simulate Physics enabled, the Physics Asset is setup correctly and the scale of the Skeleton root is correct. However when I place the car on the map, it can be controlled (it receives input, you can see on the GIF) but it isn’t affected by gravity and it does not move at all.

car-ue4

The skeleton/rig setup is just like the dune buggy from the Advanced Vehicle Pack, with a PhysWheel bones that are not connected to the mesh and VisWheel ones that are.

Can someone help me with this?