Comment 4 for bug 1574082

Are you deleting all of the contents from /usr/share/openstack-dashboard/static/ prior to collecting/compressing static assets?

If so, I don't think this is something that you should be doing, since part of the package install copies the contents of openstack_dashboard/ to /usr/share/openstack-dashboard.

If you're deleting all of the contents of the static directory, then you'll still be missing files even if you re-collect/re-compress static assets. In particular the app and dashboard directories. For reference, here is upstream's 9.0.0 static contents:
https://github.com/openstack/horizon/tree/master/openstack_dashboard/static