Run the following to fix:

cd /opt/eff.org/certbot/venv/local/bin
sudo ./pip install cryptography
sudo ./pip install zope.interface

Cryptography and zope interface are updated.

Written by Matt Cooper
Hi, I'm Matt Cooper. I started this blog to pretty much act as a brain dump area for things I learn from day to day. You can contact me at: matt@linuxtutorial.co.uk.