Unable to generate a new Account Recovery Key
I'm trying to create a new Recovery Key through my MacOS System Settings. I get an Apple ID pop-up window saying "Apple ID wants to make changes. Enter your password to allow this." So I enter my Apple ID password (which works fine elsewhere in Apple), and the pop-up window shakes in refusual of my password.
I'm stuck. What do I do now?
iMac 24″