Error: Git server extension is unavailable. Bug Report + Fix

[Ryazame]

Description

Git server extension is unavailable. Please ensure you have installed the JupyterLab Git server extension by running: pip install --upgrade jupyterlab-git. To confirm that the server extension is installed, run: jupyter server extension list.

Reproduce

Install Vanilla TLJH on Debian 13.3 minimal install
Go To PYPI MANAGER
Search for Git
Install jupyterlab-git (0.51.4)
Hit Refresh

Expected behavior

Install & Be Available

Context

To make sure User has write rights:
Ran: sudo chown -R $USER:$USER /home/jupyter-$USER/.cache/pip
Reinstalled: Same Error
Uninstalled
From Admin Terminal in TLJH
Ran: sudo -E /opt/tljh/user/bin/mamba install jupyterlab-git
Reinstalled: Fixed it!