Most electronic failures, such as light bulbs, go out "all at once".
Your washer has a couple of water mixing valves on it that other machines do not. These are specifically designed to fill the various dispensers and are controlled by the electronic control board in the console. The valve shown below, for example is a 3-way valve, costing just under $100. Since the dispensers stopped working suddenly, we can conclude that the valve is bad or
the control board is no longer sending voltage to it. You'll have to whip out your trusty volt meter and locate the wiring sheet in the top console to find out which it is.