Imbeding ipynb generated html in a wordpress page

I have embedded a Jupyter notebook generated html in a wordpress page. As you can see everything works fine except there are bits of text in the code-blocks which appear in white color (in the original notebook or if I open the html file in my browser they are in black color) and in light background appear as if the code is missing. Any help would be greatly appreciated.

The page I need help with: [log in to see the link]