Couldn't import universe without doing 'pip install -U cryptography'

[nieoh]

Got the following error after following installation steps for each aspect (Docker, making sure every version of dependency was greater than the requirement):

AttributeError: 'FFILibrary' object has no attribute 'Cryptography_HAS_SSL_ST'

Doing pip install -U cryptography per this seems to fix the issue.

[alexandercbooth]

I had a similar issue on macOS and anaconda 3.5:

AttributeError: cffi library '_openssl' has no function, constant or global variable named 'Cryptography_STATIC_CALLBACKS'

and was able to resolve it by uninstalling conda version of cryptography and pip install as suggested above. My error appeared to be conda related.