Comment 1 for bug 1161963

Ah... My bad, I forgot to update my devstack settings with a better HORIZON_CONFIG variable.

The error is somewhat nicer in that case. There's both a success message and "Error: Unable to update (<django.utils.functional.__proxy__ object at 0x7f6a818d7790>,) for the user". I'll open a new bug for the translation issue, sorry for the noise!