Couple questions about oimo.js wheel joints and motors

[Givo]

Where did the wheels go? Oimo.js wheel joint x2

I have a playground with 2 wheels and an axle. I have the wheels connected to the axle with 2 different wheel joints. https://playground.babylonjs.com/#7QLJWW#16 My question is, where did the wheels go? And, can I motorize the wheel joints? There are no errors other than the missing path to rand.png (makes error texture, which is fine, as you can see the wheels moving) What’s going on?

And he was helping at other times too.