Description of problem:
Installed Mitaka in a virtualized environment according to https://www.rdoproject.org/testday/mitaka/milestone2/ and https://www.rdoproject.org/rdo-manager/. I set up tunnelling to log into horizon and logged as the admin. A message appears in the corner of the screen:

Error: Unable to retrieve floating IP addresses.


Version-Release number of selected component (if applicable):
python-django-horizon-9.0.0.0b3-dev67.el7.centos.noarch


How reproducible:
100%


Steps to Reproduce:
1. Install Mitaka according to https://www.rdoproject.org/testday/mitaka/milestone2/ and https://www.rdoproject.org/rdo-manager/
2. Log into the overcloud as admin


Actual results:
Login successful, but you get an error message that seems a bit irrelevant...