One thing, I had to downgrade Twisted to 18.9.0(pip install Twisted==18.9.0) otherwise sslstrip gets an error like the following when you hit an https website:
File “/usr/local/lib/python2.7/dist-packages/twisted/web/http_headers.py”, line 40, in _sanitizeLinearWhitespace
return b’ ‘.join(headerComponent.splitlines())
exceptions.AttributeError: ‘int’ object has no attribute ‘splitlines’

I still see some other errors
e.g. Request.write called on a request after Request.finish was called.

but it still seems bring up the winzip site correctly via http instead of https