Hmm, that's surprising. My first thought was to wonder if f-e-k is using the Python 2 bindings, but those are only in F29 and this is F30. @kparal, was it the same traceback as before (with the KeyError: 'anonymous')?
In any case, I'll remove that bz from this update.
I apologize for the rejection there. I made a config change to let this update through yesterday, but I didn't realize that the playbook that applies the config change does not restart the composer (because we don't want to restart when composes are running) and so the config change didn't get picked up by the backend.
I have now restarted the backend, so it should not block this update next time. I will submit this to stable again for you.