Details:
If you are unable to open Notebooks in Chrome with an error that says "Failed to fetch document from the server", it is a browser issue.
Solution:
Clean browser cache and cookies. and restart the browser after cleaning.
You can find how to clean cookies and cache in this article:
https://support.revvitysignals.com/hc/en-us/articles/14548632547604-How-to-clear-cache-on-different-browsers