Notebook html output not loading without Internet connection

Hi,

Firstly many thanks for the Notebook, it’s a fantastic tool!

I sometimes have to use it without an Internet connection, which works fine until I save a notebook as html - when I open the saved html the content doesn’t load. I originally noticed this with Bokeh plots not rendering (see here) but it looks like it’s not Bokeh causing the issue. I’d be grateful for any advice on how to solve this.

Thanks,
Marcus.