I am trying to create a Flow to update a SQL database on a calendar event added, updated or deleted event.
To test the calendar trigger I tried creating a flow to create a file on event add.

Unfortunately, it does't seem to run when I create a calendar event.
When I examine my flow runs there are Failed checks every minute.

Drilling down on the failure I'm getting a 500 Bad Gateway.
Any help/insights/passed experiences/gotchas would be appreciated.
Thanks,
DLee