This also affects a non-murano install with horizon for the same error:
CommandError: An error occurred during rendering /usr/share/openstack-dashboard/openstack_dashboard/templates/horizon/_conf.html: 'horizon/js/horizon.js' could not be found in the COMPRESS_ROOT '/usr/share/openstack-dashboard/static' or with staticfiles.
This also affects a non-murano install with horizon for the same error:
CommandError: An error occurred during rendering /usr/share/ openstack- dashboard/ openstack_ dashboard/ templates/ horizon/ _conf.html: 'horizon/ js/horizon. js' could not be found in the COMPRESS_ROOT '/usr/share/ openstack- dashboard/ static' or with staticfiles.