[2.0b7] Service 'maas-proxy' failed to reload after fresh install

Every single time I do a fresh install of MAAS I see the following error. It only happens once and then it just works:

2016-06-16 02:40:13 [-] Failed configuring proxy.
        Traceback (most recent call last):
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 434, in errback
            self._startRunCallbacks(fail)
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 501, in _startRunCallbacks
            self._runCallbacks()
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 588, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 1184, in gotResult
            _inlineCallbacks(r, g, deferred)
        --- <exception caught here> ---
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 1126, in _inlineCallbacks
            result = result.throwExceptionIntoGenerator(g)
          File "/usr/lib/python3/dist-packages/twisted/python/failure.py", line 389, in throwExceptionIntoGenerator
            return g.throw(self.type, self.value, self.tb)
          File "/usr/lib/python3/dist-packages/provisioningserver/utils/service_monitor.py", line 307, in reloadService
            yield self._performServiceAction(service, "reload")
          File "/usr/lib/python3/dist-packages/twisted/internet/defer.py", line 1128, in _inlineCallbacks
            result = g.send(result)
          File "/usr/lib/python3/dist-packages/provisioningserver/utils/service_monitor.py", line 337, in _performServiceAction
            raise ServiceActionError(error_msg)
        provisioningserver.utils.service_monitor.ServiceActionError: Service 'maas-proxy' failed to reload: Job for maas-proxy.service failed because the control process exited with error code. See "systemctl status maas-proxy.service" and "journalctl -xe" for details.