The water flow sensor has a dirty connection. There is an eyelet terminal screw holding down to the electrode, that just needs to be cleaned. Just loosening and tightening the screw a few times and maybe moving the electrode more into the stream fixed mine.
Where the water comes into the ice making tray you’ll see two shiny wire electrodes. When the water enters the tray it crosses the two electrodes telling machine has enough water.
Make sure the connection from the wire is clean, and you can test the machine with the cover off and confirm you fixed it.
The electrode is located under the black plastic cover at the rear right side of the machine.
You can access it by just removing the black plastic cover that holds the door. I took all the stainless steel covers off trying to figure this out.