Saving notebook as gist throws 500 error

[rafrombrc]

From https://bugzilla.mozilla.org/show_bug.cgi?id=1370312:

I have a notebook which refuses to upload as a gist. Most of them work fine, but not this one. The symptom is when I click the "save notebook as gist" button, I get a 500 error page from jupyter ("500 : Internal Server Error").

I can't find any useful error log explaining what is failing.

I've put the notebook in question up manually at https://gist.github.com/bsmedberg/df624213397f69380407e132ef8e4c1d if you'd like to download/reproduce.

I've had this happen on multiple launched clusters.

This may be related to me updating the following packages on my master: nbformat, colorlover, and plotly

I'd still like to know the exact error (and fix if not too difficult).

[rafrombrc]

Possibly related: #558, #559.

[washort]

I tried this on an EMR 5.2.1 instance and was able to successfully upload a gist after loading the notebook linked here.