404 Not Found Message in Jupyter Workspace

What is a 404 message on a Jupyter workspace?
A 404 message gets displayed on the workspaces a file name is incorrectly mentioned in the Jupyter server.
How can you access the notebooks despite this message?
You can hit the “Jupyter Logo” above the 404 message to access the Jupyter main directory.
From the main directory, you can access the individual files and notebooks.

Next steps to resolve the 404 message?
While you'd be able to access the notebook with the above steps and continue working on the exercises through the Jupyter directory, we also recommend reaching out to support or reporting this through the page feedback option in order for our teams to review and resolve the message.
You can fill out this form to share this with Udacity Support!
For reporting this directly from the classroom lesson, please refer to this article.