Comment 23 for bug 1765191

I just noticed that openstack-dashboard-ubuntu-theme is a binary package built out from the horizon source package, just like openstack-dashboard, but it comes from universe and universe-proposed was not enabled in this node. so disregard my previous comment.

# apt policy openstack-dashboard-ubuntu-theme
openstack-dashboard-ubuntu-theme:
  Installed: 3:13.0.0-0ubuntu1
  Candidate: 3:13.0.0-0ubuntu1
  Version table:
 *** 3:13.0.0-0ubuntu1 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status