Kitchenaid DW won't start

I started a load of dishes tonight - after learning how to reset the dishwasher because it was blinking "clean" for over a week. It started up just fine but my husband thought too much water was entering the dishwasher and that it would overflow. He opened the dishwasher door and hit the cancel button. Now I cannot get it to start again. I can push the cycles and they will light up but when I hit the "start" button it won’t start.
We turned the circuit breaker off for approximatly 30 seconds and turned it back on and it didn’t fix it. Any suggestions?
I just replaced the control panel/board and the vent