Same for me, i always identified with biometrics and now the app wants a pin from me. I cant remember that pin. Have you found a way?
Same here!
I need to find/reset mine as well.
Same problem, It asks for PIN which I have never established PIN for Autheticator, always used biometrics, please help
Same! I've never set up PIN code, but I requires it suddenly.
Found it.
https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/FAQ_Locked_Out.html&_LANG=enus
So basically delete the LastPass Authenticator app and re-install it. When opening you can recover the account with Lastpass Master password which you probably will remember. Then you can setup new one without it asking the old one.