"Failed to display Jupyter Widget" on online documentation

[bdelepine]

Hello guys,

I was browsing the jupyter doc and I saw this error-message boilerplate a few times:

Failed to display Jupyter Widget of type HBox.
If you're reading this message in Jupyter Notebook or JupyterLab, it may mean that the widgets JavaScript is still loading. If this message persists, it likely means that the widgets JavaScript library is either not installed or not enabled. See the Jupyter Widgets Documentation for setup instructions.
If you're reading this message in another notebook frontend (for example, a static rendering on GitHub or NBViewer), it may mean that your frontend doesn't currently support widgets.

I guess a graph was expected. Each time, it's after a time-consuming operation.

HTH, best

[Midnighter]

Thanks for the report @bdelepine, we anyway need to look at updating our documentation next week.