The answer is that for washing machines with LCD screen, under settings/network, you have to tell the washing maching which of the 2 apps - washing machine app or smart home app.
Depending on your model of washer, the washing machine app is the only that will work. The default is smart home app. You still have to register you washing machine under samsungsmartappliance.com You still need to access your wifi router and find the MAC address to register the device.
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