we are trying autoscalling using heat and in notifier.log file we are getting this error

ERROR aodh.notifier BadRequest: Expecting to find domain in user. The server could not comply with the request since it is either malformed or otherwise incorrect. The client is assumed to be in error. (HTTP 400) (Request-ID: req-370b3e89-2778-40d5-971a-09d903c8293f)

Heat template i am using from this github url.

https://github.com/openstack/heat-templates/blob/master/hot/autoscaling.yaml (https://github.com/openstack/heat-tem...)

please help

Thanks