I had nbconvert and Latex kits installed but nbconvert didn't have access to the templates and dependencies it needed.

I was able to circumvent that by explicitly running the terminal command jupyter nbconvert --to webpdf /.../notebook_name.ipynb (I needed to playwright install chromium for that to work).

However, for a long-term automated fix I tried:

• pip install nbconvert[webpdf], brew install basictex (with sudo password), and tried installing all potential packages from tlmgr it would want, to no avail.
• I also started a different approach: adding an jupyter_nbconvert_config.py file, templates, and preprocessors to /Users/username/.jupyter, but didn't get that working either (yet).