I\'m trying to create a virtualenv with virtualenvwrapper, but when I use mkvirtualenv I get the following :
ERROR: virtualenvwrapper c
I had this same issues and tried many many things, what found as a solution is i had three pip version, pip with 2.7, 3.6 and 3.7. and 3.6 was the one works fine for many things, and install as sudo pip3.6 install virtualenv, and it works fine.
I would suggest, check your pip version and tried to install based on your pip ver.