If you enter your six-digit 2FA code correctly within the 30-second time limit and still encounter a “2FA Google Auth is invalid” error, it could be that your 2FA application is not properly synchronized with your device's time zone settings or the network time.
** To fix this, enable network syncing under Date & Time settings on your device.
Go to System > General Management > Date & Time
Switch on "Automatic date and time"
Go to Settings > General > Date & Time > switch on "Set Automatically"
** If the error persists, we recommend you delete your 2FA entry and create a new entry using the QR code or the manual key.
In case you have tried all the steps above but the 2FA is still locked, please submit a request together with photos for verification through this link so that our team can assist you further. (The instructions with examples can be found here.)