Anyone solved it? My finder was just working suddenly, but don't know why. I think that maybe you could try cleaning data of stock samsung experience home. The time that I found finder don't working, I disabled it. Then I found that stock samsung experience home is laggy when I open any folder in the home screen or apps tray. So I clear the data of Samsumg experience home and don't creat lot folder, seems that be better than before when opening folder. And finally I just try re-enable the finder app, and it just working. Maybe it's not the reason, but could give it a try.
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