You can use a “recovery code” to log in instead when the authentication code cannot be confirmed for some reason.
The “recovery codes” are the ten codes displayed when you registered for the two-factor authentication.
Press [Enter recovery code] at the bottom of the two-factor authentication screen, and enter one unused recovery code. (See figure below)
＜Related questions＞
Q. I forgot my recovery code
Q. “Enter the authentication code displayed on the registered app” is displayed. Where can I find the authentication code?