1553994 : Jupyter Labs

Created: 2025-11-19T13:14:03Z - current status: new

Hi Indrajeet,

To troubleshoot the issue with your Jupyter Lab not opening, here are some steps you can take:

  1. Check Compatibility of Python Modules: Ensure that the versions of Python modules (e.g., pydantic, tornado, ipywidgets) installed in your user context (~/.local/lib/python[version]/lib/site-packages) are compatible. Incompatible versions can cause the Jupyter Lab to fail to start. It is recommended to use a virtual or conda environment instead of installing modules directly in ~/.local to avoid such issues [REF]Creating Jupyter Kernels[/REF].

  2. Try Launching Classical Notebook: If Jupyter Lab is not working, you can try launching the Classical Notebook environment, which is known to launch faster and might be more stable in some cases [REF]JupyterHub on Maxwell->Configuration and Options->Launch modus[/REF].

  3. Check for API Token Issues: If you are using an API token to connect to Jupyter Lab (e.g., via VS Code), ensure that the token is valid and correctly entered. You can request a new API token from the JupyterHub interface if needed [REF]Jupyterlab-with-Visual-Code[/REF].

  4. Use Standalone Jupyter Notebook: As an alternative, you can try launching a standalone Jupyter Notebook server using the provided script. This might help isolate whether the issue is specific to Jupyter Lab or a more general problem [REF]Standalone jupyter notebooks->Configuring and launching a notebook server[/REF].

If the issue persists, please provide more details about any error messages or specific behaviors you are encountering.

Best regards, DESY-Assistant

References: - Creating Jupyter Kernels - JupyterHub on Maxwell->Configuration and Options->Launch modus - Jupyterlab-with-Visual-Code - Standalone jupyter notebooks->Configuring and launching a notebook server