jupyter_server | core services , APIs , and REST endpoints—to Jupyter web | Continuous Deployment library

I had the same error message attempting to run jupyter lab today after updating everything on Anaconda. It did not affect jupyter notebook, so that may still work regardless.

What worked for me was running the following:

• Right now when running jupyter notebook I do see dates in YYYY-DD-MM format, such as Last Checkpoint: 01/13/2022 (autosaved)
• You can update this by changing your browser settings to "English (United Kingdom)" instead of American English (See instructions here)

Some tips - how did I figure this out?

1. Go to the GitHub for jupyter notebook - https://github.com/jupyter/notebook
2. Search the repository for "Last Checkpoint:"
3. We can find the relevant code here
4. We can see this uses var chkd = moment(this._checkpoint_date); ...; chkd.calendar();, meaning this is formatted in the browser using the MomentJS library
5. From the docs we can see that the display format is configured using moment.locale(...) - so we can search for this snippet in the code. We can see it here - moment.locale(_uiLang())
6. Looking at _uiLang we can see it's just a wrapper around the browser language preference (source) - _uiLang = function() { return navigator.language.toLowerCase(); }
7. I checked the localization files for MomentJS and we can see that British English does have the "correct" date format specified (source)

Consider creating a separate environment, e.g.,

jupyterlab-server version 2.10.0 had an unintentional breaking change which was hotfixed in 2.10.1. To fix this issue upgrade to 2.10.1 (or newer):

Build tags in you environment.yml are quite strict requirements to satisfy and most often not needed. In your case, changing the yml file to

This might be a problem with nest-asyncio=1.5.2 (issue). You can run the following commands to uninstall the existing version of nest-asyncio=1.5.2 and upgrade to 1.5.3:

In your current requirements.txt you marked pywin32 with environment marker platform_system == "Windows". I think the syntax is wrong. The correct syntax from PEP 496 is:

The problem seems to be that G.nodes() isn't a list of labels. You can get the node numbers or labels via converting it to a list (list(G.nodes())).

An updated version could look like:

Restarted the computer, now it works. Gotta love technology....