Custom extension using React

Hello, I tried to make a Custom Bokeh Extension with material-ui wich use react
You can see my attempt at GitHub - xavArtley/BokehMaterialUI: Repository to create a MRE of problems encoutered when trying
The package can be installed using python develop
And I provide a small example in the example directory
However it does not work, I end up with the following error


I suppose making a custom extension around react using the bokeh compiler engine is not as simple.
Is there a way to bundle correctly this small example?

This specific topic is really one only @mateusz can address at present, but he does not frequent the discourse much. I’d suggest opening a GitHub discussion since he is much more likely to see something there.