Model Viewer not working

[oipa]

Hello,

I installed node.js for windows independentely:

>node -v
v14.15.5

Then I run

cd stk
  ./build.sh
  cd server
  ./run.sh

and openned http://localhost:8010/model-viewer

But buttons are not working. "Instructions" does nothing and "Models" allows me to select a file but then nothing occurs.

What is going wrong?

*Extra question: Would this tool allow me to load ShapeNet models (.obj), see anotations and change its colours? (ie. I want to load all car's models and make the front right-hand door always red)