its not working on my end still. chronobank should really take a look at it, i'm not the only who experience this issue there are others as well. 2fa shouldn't be a mandatory for this.
i tried everything to make it work and even recover my password to make sure i'm not making guesses.

Maybe you need to synchronize google authenticator ? Some time its helps
To make sure that you have the correct time:
1.Go to the main menu on the Google Authenticator app.
2.Tap More Settings.
3.Tap Time correction for codes.
4.Tap Sync now.