No alerts are being picked up by the VizAlertsConfig\ScheduledTriggerViews workbook. You can verify this by looking at it yourself in Tableau. If you see nothing in that viz, then no VizAlerts will be processed. Play around and see if you can figure out why nothing is showing. It could be that the schedule names don't match the pattern you put into your workbook parameter, or that the schedules are not disabled, or that you have just not subscribed any vizzes to them.