Password entered to change Security & Privacy 'preferences' is refused.
I have not been able to unlock Microphone access in Security & Privacy preferences.
According to this webpage I should be able to access Security & Privacy options with the same password I use to log into my MacBook Pro. -> Change or reset the password of a macOS user account in macOS Mojave or earlier - Apple Support
However, that password is not being accepted after I click the lock on the Security & Privacy screen.
How do I fix this without creating a new password?
Thanks.
Earlier Mac models