Same problem as everyone else. Three month old Samsung 65" smart tv that was working fine with Netflix until a couple of days ago. Tried all the suggestions and still experienced the log in problem. Finally found something that seems to work for now. Once I successfully logged back in and was able to connect with Netflix, I then backed out of Netflix using the Return (Exit) button on the Smart Hub remote instead of the Smart Hub button. I realize this probably isn't the best fix but can live with a couple of extra keystrokes at the back end.
Same problem as everyone else. Three month old Samsung 65" smart tv that was working fine with Netflix until a couple of days ago. Tried all the suggestions and still experienced the log in problem. Finally found something that seems to work for now. Once I successfully logged back in and was able to connect with Netflix, I then backed out of Netflix using the Return (Exit) button on the Smart Hub remote instead of the Smart Hub button. I realize this probably isn't the best fix but can live with a couple of extra keystrokes at the back end.