A connection to the notebook server could not be established. The notebook will continue trying to reconnect. Check your network connection or notebook server configuration.
We would need a lot more information before we can help. For example:
- JupyterHub version, how is JupyterHub deployed (e.g. kubernetes, what Spawner, etc.)
- Browser
- environment, e.g.
conda listorpip freeze - network information (where is your browser relative to the server - same network, same machine, over the Internet, etc.)
- when do you see the error (can you never connect at all, or does it happen after some time, etc.)
Browser is chrome
Environment is conda list
It happens after some time
Run conda list and then add the output to your reply to provide your environment details.