Samsung C9 mobile phone account can't log in, and the agreement terms will flash back, indicating that the session has expired.

I contacted the customer service in charge of Samsung account, saying that it was a group incident after C9 update, not a problem with our mobile phone or account, and they were handling it.

Let's stop fooling around.

Supplement: Through the following operations, the pro-test can log in.

Settings-Application-3 points in the upper right-"Samsung Experience Service-Uninstall and update the upper right.