Cryptacular is broken

I had the same issue running python 3.6.6. With this one liner I was able to install cryptacular from the latest commit.

pipenv install -e hg+https://bitbucket.org/dholth/cryptacular@cb96fb3#egg=cryptacular

You will need to have mercurial installed

apt-get update && apt-get install -y mercurial

More info on this thread

We don't know the error exactly, but last weekend there was an security update in the base image. Therefore we pinned our python image to 3.6.4.