Depress clutch to set cruise?

Can someone tell me what was the cause of the " press and release clutch pedal before setting cruise" solution is? I have a 2014 pete 388 with an mx13. Pto cruise works at standstill. According to my prolink, all looks normal.
I have vehicle speed, clutch sensor is normal, service brake normal, set, resume, cruise switches all normal. New sensor for fun also.

 

Works fine while parked. Does not work going down the road. That is where I get the press and release clutch pedal is moving down the road.

 

I understand how the pto works.
As stated in my first post, I did replace the sensor with zero change. The puzzling part is that it works sitting still, I have road speed from the abs and at ecm. The sensors all are reading as they should.