Check that the water valve is getting power when it should (120 volts)
If it is then either the valve is shot or the screen filter on the inlet side of the valve is clogged solid with crud.

Remove the valve from the machine if it is a clogged filter clean it. Do not permanently remove it as it is there to keep crud out of the valve which could hold it open and cause a flood.

If it is not getting voltage check that the overflow switch is activated and closed (0 ohms). Sometimes the float can get stuck in the up position so the unit thinks it is already full with water. In this case remove th float and clean it.

You could measure the voltage across the valve/overfill switch combo (they are wired in series). If there is no power then it could be one of the wires from the control panel is broken or a bad control board. I am speculating here as I cannot find info on this unit.