Jupyter Notebook

I opened jupyter notebook and openend the HTML.ipynb

I clicked on Cells>Run all

I waited for a while and then I got this result:

https://ibb.co/gRg3Z0n

If this can help I also got this message.

https://ibb.co/ZcbtH1N

How can I fix this so that I can generate the HTML code?

Thanks in advance

Most items coming from questions on the community forum

• a proper multicategory bar example based on https://community.plotly.com/t/multicategory-axis-type-example/26392
• example of shape or annotation covering several subplots thanks to xref='paper'. Also the shapes and annotations tutorial should link to each other.
• orthographic projection example in 3d axes tutorial (or

Now that #3490 has been merged, we should add more prometheus metrics to the notebook server!

Some ideas for metrics to add...

1. Number of kernels running (labeled by type)
2. Number of sessions open (not sure if this is useful?)
3. Number of terminals open
4. Mirror of the activity tracking metrics
5. Kernel start / stop latency metric

Contributed recipes are not checked in CI, were mostly added a long time ago and so they might be out-of-date.
It would be nice if someone checked them, updated packages versions used there and verified that they still work.

There is already a notebook:open-with-voila command to open the voila dashboard in a new browser tab. It's in the palette and the view menu, but it would be great to have it in the preview toolbar too:

We could for example use the jp-LauncherIcon:

![image](https://user-images.g