Comment 4 for bug 1561197

This is where it fails for me during stack.sh.
This is a devstack environment running on a bare metal with the latest master branch.
https://gist.github.com/KevoTran/48797f2833acd87ec33032034369a4e3

Local.conf includes:
enable_plugin neutron-lbaas-dashboard https://git.openstack.org/openstack/neutron-lbaas-dashboard
and
enable_service horizon

Note, this only occurs if the devstack was unstacked and then restacked.
On initial stack.sh, everything is fine and successful.