OK, I found that the nodejs installation needed updated in that l4t-ml container. I just patched the Dockerfile here in commit 77fecc. If you don’t wish to rebuild the container, you can update your container by running the terminal commands below inside the container.
Before running the commands below, if JupyterLab server is already running, stop it by going to File->Shut Down
# update nodejs / jupyter-widgets
apt-get update && apt-get install -y curl
curl -sL https://deb.nodesource.com/setup_10.x | bash -
apt-get update && apt-get install -y nodejs
jupyter labextension install @jupyter-widgets/jupyterlab-manager
# restart JupyterLab server
jupyter lab --ip 0.0.0.0 --port 8888 --allow-root
If you wish to save these changes to the container, you can use docker commit