Moe1111 wrote:
Hello, I recently upgrade my Mac to MacOS Catalina. However, I can not add/edit my contacts anymore, unfortunately. Your prompt action due to my request will be highly appreciated.
Shut down the mac and restart.
If no resolve—Boot into Recovery (Command R) and from the dropdown menu: Utilities> Disk Utility> run the First Aid on your Macintosh HD (and the "Macintosh HD-Data" volume as well if Catalina) If errors are found and repaired, run again until no errors reported.
Recovery: https://support.apple.com/en-us/HT204904
If still no resolve reinstall the combo update on top of your existing macOS 10.15.2
Combo update macOS 10.15.2 https://support.apple.com/kb/DL2028?viewlocale=en_US&locale=en_US