Working in Jupyerlab 3 ?

[atiro]

Would be interested to try the widget out but (trying to run the example notebook) I'm not seeing the instantiated widget, just the code call being returned:

LineUpWidget(value=[], layout=Layout(align_self='stretch', height='600px'), options={'rowHeight': 20})

Also seeing an error "Exception opening new comm" in console.

Not sure if this is issue with my local setup or the widget doesn't work with 3.0 ?