Hangs after clicking Download as Zip, and no yaml or readme file created on install

[carolynwclayton]

I am having some trouble getting the nbzip extension to work / install correctly. The document cookie never gets a zipToken, and the "Still zipping" loop continues forever. In addition, no yaml or readme file gets created for use by nbextensions.

In regards to the zipping loop, it appears that .jupyter/nbconfig/tree.json expects a path to a javascript file (currently set to "nbzip/tree"), however it seems the tree.js file is not referencing the handlers, or that there is some main file missing since the zipToken never gets set or updated.

Steps I took to install:
pip install nbzip
(issues with writing to /usr/local/share/jupyter and the jupyter_notebook_config.json led me to use the user flag)
jupyter serverextension enable --py nbzip --user
jupyter nbextension install --py nbzip --user
jupyter nbextension enable --py nbzip --user

Contents of .local/share/jupyter/nbextensions/nbzip on initial install and enable:
tree.js

I've also tried copying the full contents of .local/lib/python2.7/site-packages/nbzip into .local/share/jupyter/nbextensions/nbzip, just in case it needed to access the handlers and init files. I've also tried manually creating a yaml file and the readme, which fixes the nbextensions configure tab, but does not fix the zipping loop.

The format of the document.cookie: "_pk_id.1.9e6f=<16 alpha-numeric>.<10 numeric>.<1 numeric>.<10 numeric>.<10 numeric>.; _xsrf=<1 numeric>|<8 alpha numeric>|<32 alpha numeric>|<10 numeric>"

Screen Shot of zipping loop

Screen Shot of lack of yaml and readme file

Screen Shot after manually creating yaml and readme

Versions:
jupyter=1.0.0
jupyter_contrib_nbextensions=0.5.1
nbzip=0.1.0