This was fixed some years ago in lazr.restfulclient 0.13.3:
0.13.3 (2013-03-22)
===================
- Fall back to httplib2's default certificate path if the
Debian/Ubuntu one doesn't exist. The default bundle might work,
but a path that doesn't exist is never going to. New httplib2
bundles contain the required CA certs.
This was fixed some years ago in lazr.restfulclient 0.13.3:
0.13.3 (2013-03-22)
===================
- Fall back to httplib2's default certificate path if the
Debian/Ubuntu one doesn't exist. The default bundle might work,
but a path that doesn't exist is never going to. New httplib2
bundles contain the required CA certs.