Kernel crash without any error code

[flupinette]

As soon as I run this part :

config = get_config('rlbench')
# uncomment this if you'd like to change the language model (e.g., for faster speed or lower cost)
# for lmp_name, cfg in config['lmp_config']['lmps'].items():
#     cfg['model'] = 'gpt-3.5-turbo'

# initialize env and voxposer ui
visualizer = ValueMapVisualizer(config['visualizer'])
env = VoxPoserRLBench(visualizer=visualizer)
lmps, lmp_env = setup_LMP(env, config, debug=False)
voxposer_ui = lmps['plan_ui']

The kernel crash immediatly without any error codes. My Jupiter log is :

15:57:11.722 [info] Starting Kernel (Python Path: ~/anaconda3/envs/voxposer-env/bin/python, Conda, 3.9.23) for '~/VoxPoser/src/playground.ipynb' (disableUI=true)
15:57:25.028 [info] Process Execution: ~/anaconda3/envs/voxposer-env/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
15:57:25.033 [info] Process Execution: ~/anaconda3/envs/voxposer-env/bin/python -m ipykernel_launcher --f=/run/user/1000/jupyter/runtime/kernel-v3a22ff6aa71b522f734383011eba026f2c6d82911.json
    > cwd: ~/VoxPoser/src
15:57:25.048 [info] Process Execution: ~/anaconda3/envs/voxposer-env/bin/python -m pip list
15:57:26.232 [info] Kernel successfully started
15:57:26.255 [info] Process Execution: ~/anaconda3/envs/voxposer-env/bin/python ~/.vscode-server/extensions/ms-toolsai.jupyter-2025.5.0-linux-x64/pythonFiles/printJupyterDataDir.py
15:57:27.090 [error] Widget Error: Failed to access CDN https://unpkg.com/ after 0 attempt(s), TypeError: Failed to fetch
15:57:35.750 [error] Disposing session as kernel process died ExitCode: undefined, Reason: 

Does anyone understand why this happen ?