Use of Google Authenticator for 2 factor authentication

Can anyone help me understand why the T-mobile website won’t take my authentication codes when using Google Authenticator?

I have initially set up 2-Factor authentication and chosen to use Google Authenticator as the means but every time I have set this up and tried to log into my account with it, the site will not take any of the codes I type for it. I end up having to switch back to SMS Text for authentication.

Can anyone help me understand and fix the Google Authenticator to use it for 2-factor?

Best!