The current version of jupyter has authentication on by default, requiring you to pass in the token as a parameter to the url. If you paste the full url into the ein:notebooklist-open it fails with 'status parse-error', possibly because /api/contents/ is appended to the end of the url so the server doesn't find the token and tries to redirect to a password entry page (it is showing a 302 http status code in the output).
The current version of jupyter has authentication on by default, requiring you to pass in the token as a parameter to the url. If you paste the full url into the ein:notebooklist-open it fails with 'status parse-error', possibly because /api/contents/ is appended to the end of the url so the server doesn't find the token and tries to redirect to a password entry page (it is showing a 302 http status code in the output).