Is there some reason you make codes expire in 5 seconds? Its insane the little amount of time you give. I'm still waiting for a code to get into the game and its been 15 minutes so far. What do you expect me to do? You send me the code for the webpage login but not the game login. What do you expect me to do?
What's wrong with the game's authentication code?
Once again, it does not send the code to enter the game to the email.
Sometimes, I don't understand why, a fault is seen, it is solved and a few days later the fault is there again.
But hey, I know you won't be able to clarify the reason for the failure.
Try again, it should have been resolved.
One thing that can sometimes help when it's an isolated issue is logging off and reloging on the web page before trying to login in the game (with the same account you're trying to go in-game, of course).
Using 2FA app is recommended. It's really neat and much better UX than whole email fiasco. You'll always have the code ready when prompted, no need to wait for emails, or use the code if it expires within seconds of receiving it.