Scheduled Events Not Executing Automatically

[lazrobot]

I have an event which, when criteria is met, runs a report and triggers an email.  I see the Event in Schedules and in Upcoming Activities, but it never quite makes it to Past Activities unless I run it manually (in which case everything functions as expected).

This problem happened all of a sudden one day, but there are no FM model changes or server changes that happened that day.  Plus as I wrote, when I kick the Event off manually it works just fine.  I renewed credentials just to be sure. 

What am I missing?