Hi @briantrompeter
Two options to try.
1. Perform a power reset by turning off the breakers or removing the fuse that supply power to the dishwasher, in the house power box, wait 5 minutes and then restore the breakers (or replace the fuse) and check if it now works.
2. If still no good turn off the power to the dishwasher and pull the dishwasher forward from under the countertop far enough that you can tilt it backwards from the top so that the water drains from the tub.
Stand the dishwasher upright again and then turn on the power and check if it works.
If it does then it may have been a sticking water level pressure switch. Something to keep an eye on if it happens again