C:\\Users\\danie01\\fox\\test\\robotframework>pipenv install --python 3.5 Creating a virtualenv for this project... Pipfile: C:\\Users\\danie01\\fox\\test\\robotframe
Can you delete your old virtualenv C:\Users\danie01\.virtualenvs
C:\Users\danie01\.virtualenvs
Check the version of python inside Pipfile
[requires] python_version = "3.5"
After go to your project to create again your virtualenv
cd C:\Users\danie01\fox\test\robotframework pipenv install