notebook rendering used to work, now stuck forever on "This notebook is taking a long time to render."

[stevengj]

I've been using nbviewer.org for several years now to share my (Julia language) notebook https://math.mit.edu/~stevenj/Solar-Quadrature.ipynb.

However, the nbviewer link (https://nbviewer.org/urls/math.mit.edu/~stevenj/Solar-Quadrature.ipynb) recently stopped working. It now gets stuck forever(?) on:

(I'm using Firefox 121.0 on a Mac.)