According to a post of the author of Zotquery version 10.0 does not work in the moment (https://github.com/smargh/alfred_zotquery/issues/6); however, version 8.5 from Packal should work. I had the same problems with version 8.5 you described above.
Change the following line of code in bundler.py in the directory ~/Library/Application Support/Alfred 2/Alfred.alfredpreferences/workflows/user.workflow.your-id
lines 161 and 162
PIP_INSTALLER_URL = ('https://raw.githubusercontent.com/pypa/pip/'
'develop/contrib/get-pip.py')
to
PIP_INSTALLER_URL = ('https://bootstrap.pypa.io/get-pip.py')
Should work then.