Voila Ipyvuetify coud not instantiate widget error

Question

I got this error and really I could not find a solution. I have a working version of my program previously installed on a separated working environment. I could not make new installations work even with the same packages version.

Here is what I am doing(for having same versions)

pip install jupyterlab==3.4.3

pip install ipyvuetify==1.8.2

pip install voila==0.3.5

jupyter labextension install jupyter-vuetify

jupyter nbextension enable --py ipyvuetify

jupyter nbextension enable --py ipyvue

jupyter nbextension enable --py widgetsnbextension
voila es.ipynb --enable_nbextensions=True

no error is displayed on voila kernel

The file works properly if I run in jupyter lab like this

jupyter lab es.ipynb

Thanks for any help

Answer 1

I solve the issue by downgrading ipywidgets like this

pip install ipywidgets==7.7.1 
jupyter labextension install @jupyter-widgets/jupyterlab-manager 

The new 8 version give some problem: https://github.com/voila-dashboards/voila/issues/1188