View the original community article here
Last tested: Sep 12, 2018
Did you forget the tags parameter?
If you have access, you can check for this line in logs:
[ERROR|00846|] :: Looker::Scheduler::Webhook::ActionHubExecuteError : Query requires a field tagged email or user_id or segment_anonymous_id.
Side_note: Looks like once you have added tags parameter the code needs to be pushed to production too.