"Notebook validation failed" message in Jupyter Notebook

[spring-haru]

Describe the bug
Opening a student version of assign-full-example-v1.ipynb created using a file at the following url

https://github.com/ucbds-infra/otter-grader/blob/master/docs/_static/notebooks/assign-full-example-v1.ipynb

generates the following "Notebook validation failed" message in Jupyter Notebook.

BTW, it is the file mentioned at https://otter-grader.readthedocs.io/en/latest/otter_assign/v1/notebook_format.html#sample-notebook

The save operation succeeded, but the notebook does not appear to be valid. The validation error was:

Notebook validation failed: Additional properties are not allowed ('id' was unexpected):
{
 "metadata": {
  "deletable": false,
  "editable": false,
  "trusted": false
 },
 "id": "hungarian-region",
 "cell_type": "code",
 "source": "# Initialize Otter\nimport otter\ngrader = otter.Notebook(\"assign-full-example-v1.ipynb\")",
 "execution_count": null,
 "outputs": []
}

To Reproduce
Steps to reproduce the behavior:

1. Place assign-full-example-v1.ipynb in a given folder, download from the above link.
2. cd into the folder
3. otter assign assign-full-example-v1.ipynb dist --v1 in a shell
4. Open assign-full-example-v1.ipynb in dist/student in Jupyter Notebook.

Expected behavior
No such message.

Versions
Otter 3.0.3

Additional context
macOS Big Sur
Am I missing something?

[chrispyles]

What version of Jupyter notebook do you have installed? This error is caused by a mismatched version of nbformat and notebook. Cell IDs were added to the notebook format in nbformat 5.1.0 but I don't think that the notebook front-end supported them until notebook 6.4.0.

[spring-haru]

After your response, I created a new environment with

nbformat 5.1.3
notebook 6.4.3

but the "failed" message still persists.

[chrispyles]

@spring-haru I've opened #344 which implements a fix for this issue. It will be included in v3.0.4, to be release tonight/tomorrow morning.