Error: couldn't get currently installed version for /opt/eff.org/certbot/venv/bin/letsencrypt: Traceback (most recent call last): File "/opt/eff.org/certbot/venv/bin/letsencrypt", line 7, in <module> from certbot.main import main File "/opt/eff.org/certbot/venv/local/lib/python2.7/dist-packages/certbot/main.py", line 7, in <module> import zope.component File "/opt/eff.org/certbot/venv/local/lib/python2.7/dist-packages/zope/component/__init__.py", line 16, in <module> from zope.interface import Interface ImportError: No module named interface ...............................................................
command:unset PYTHON_INSTALL_LAYOUT /root/.local/share/letsencrypt/bin/pip install --upgrade certbot