Can you login on your phone using your Samsung account email and password?
I tried Edge and Chrome to log in. The screen for a second changes to the two step verification but does not stay there for more than a second and it goes to:
Your session has been terminated.
Go to the Samsung account website and try again.
Sign in to your Samsung account
I had to disable my UBlock Origin (ad blocker). As soon as I refreshed, it worked fine.