Samsung Washing Machine (WW90T554DAW/S1) cannot find WiFi

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Hello,

We recently bought a washing machine and it connected to the Nest WiFi for at least two weeks. But a few days ago I noticed that it wasn’t connecting to the Nest WiFi anymore. I tried to reconnect it to the same WiFi but it wasn’t coming up on the list anymore. Although, I was able to connect the washing machine to an old BT router.

Can anyone please help me?

The washing machine is: SAMSUNG Series 5+ AddWash WW90T554DAW/S1

I don’t know if this can help: