Hello guys

I am learning Django using this tutorial. Everything was working fine.

When I started my computer today and tried to activate virtualenv, I got this error:

Code:
$ source env/bin/activate
Failed to activate virtualenv.
I am also unable to create new virtual environment. When I try to do so, I am getting this error:

FileExistsError: [Errno 17] File exists: 'venv/lib/python3.5/lib-dynload'

What's going on ? Please help