I don’t have an answer for you [yet], but I strongly suspect that it’s to do with Jupyter rather than Bokeh. I just tested out the notebook to see if we didn’t catch a problem in a recent release, but it works like a charm in both Chrome and Firefox for me.
The “find-and-replace does not exist” error message seems suspicious to me, and was present on another unsolved (as far as this Discourse) notebook problem, as well as a similar issue involving Plotly that I found out on the greater internet.
I would start by trying a different browser and seeing what happens, at least to get more data.