I'm facing same

Reset your samsung account password then on secure folder Tap on forgot password and login

Mayebe samsung has different rules for different nations as 5g update is not availed yet by the samsung for it user in india.....as it comes in 2different variants 4g(exynos)/5g(snapdragon).....so brands may having problems while tying up with samsun...

Take out your sim then rub it and then put it....it will start working