I can't open the "Date & Time" Settings …

Can't open 'System Settings' >'General' > 'Date & Time.
It just sits there. Can edit time related Menu Bar settings.

MacMini6,1
OCLP 1.2.1
macOS 14.1.1

Also can't run app 'AirMessage' (to share iMessage), and 'Screen Sharing' often loses KB/Mouse, requiring SSH to restart service.

Any clues?

Thanks in advance.