Jupyter notebook failed to save. Browser was closed but terminal still running.

I closed the browser in which I created the Jupyter notebook, but left the terminal running. But I see that no notebook was created in the designated location and when I try to access the notebook through browser history, it says:

404 : Not Found
You are requesting a page that does not exist!

I am pasting below a snapshot of the terminal, which shows my notebook 'combine_files.pynb' has been saved. However, I can't find the file on the computer. Is there anyway to retrieve my file? (For information, my Finder was hung at the time I closed my browser)

Start with the terminal output and the designated location described in the report; check whether combine_files.pynb exists after the browser closes. Done means determining why the saved notebook is absent or inaccessible and documenting a reproducible outcome.

Written by the indexing model from the issue text.