ubuntu@juju-stg-ue-devportal-machine-4:/var/lib/juju/agents/unit-devportal-app-0/charm$ sudo JUJU_UNIT_NAME="devportal-app-0" /var/lib/juju/agents/unit-devportal-app-0/charm/run.py "python manage.py import_md"
System check identified some issues:

WARNINGS:
cmsplugin_zinnia.LatestEntriesPlugin.authors: (fields.W340) null has no effect on ManyToManyField.
cmsplugin_zinnia.LatestEntriesPlugin.categories: (fields.W340) null has no effect on ManyToManyField.
cmsplugin_zinnia.LatestEntriesPlugin.tags: (fields.W340) null has no effect on ManyToManyField.
fixing page tree
fixing plugin tree
all done
2016-04-21 07:50:25 ERROR    Don't know how to interpret '/tmp/tmpcF8n_g/snapcraft/docs/images'.
fixing page tree
fixing plugin tree
all done