GeoCAT-examples provides a gallery of visualization examples demonstrating how to reproduce plots from NCL Applications scripts with packages in Python. It also includes some longer form examples demonstrating how to use functionality from various GeoCAT packages.
After an update to Sphinx 7, we ended up with broken links and thumbnails in our gallery (see #587).
To address this we pinned the version we're using, but we should investigate further and see if we can report and/or address the issue.
Both sphinx-gallery and sphinx-book-theme should have support for Sphinx 7, but clearly something isn't working properly.