After I updated my MacBook Pro (15-inch, 2018) to BigSur 11.1 something went wrong.
I can log in, I can change the admin users password, I can access my keychain and I can run
sudo with no issues.
What I can't do though is to click the padlock to make changes in System Preferences. Even when I enter the correct password the dialog behaves as if I entered the wrong password.
Any help appreciated.