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Run into the same issue

@krassowski > Mermaid diagrams were added in [jupyterlab/jupyterlab#14102](https://github.com/jupyterlab/jupyterlab/pull/14102). It might be as simple as adding the new packages to https://github.com/jupyterlab-contrib/rise/blob/main/packages/application/package.json and rebuilding but I am not familiar with the codebase...

Ran into pretty much the same issue when following the instruction. After the first two steps (cloning the repo and moving into `./rise/jupyterlab_rise`) the next step (`pip install -e ".[test]"`)...

@krassowski I've read about it but haven't tried it. I don't have much time to spare so I can't promise it, but if I ever go back to it I'll...