Problem with Authenticator for facebook

Question

I set up 2 factor authentication for my Facebook account. I use Microsoft Authenticator to get the code to sign in to my Facebook account. I have no problem signing in before this. I logged out my Facebook account today and when I wanted to log in again, Facebook asked for the code from the 2 factor authentication app (ie Microsoft Authenticator). I keyed in the code generated in the Authenticator, however I failed to logged in to my Facebook because it says the code doesn’t work. I can’t log in to my Facebook account now and the code generated by the Authenticator doesn’t work. May I know how what’s wrong and how to solve this problem? I just want to log in to my Facebook account.