Error message meaning

Is there a date in the field shown below?

Yes:

I thought maybe it was due to the date being yesterday but I set it to yesterday in my test environment and I did not get an error when starting the appointment. 

The Appointment was yesterday, I was just told about this first thing this morning.

What are you doing when you get the error?

Hi @bhyland, could you share a screenshot of the trace and a screenshot on the Service Order Type on the Time Behavior tab? 

Hi @bhyland - can you share the resolution with the community? Thank you!