Contacts, "Edit Smart Group" grayed out
In Contacts, when I want to edit a Smart Group, the option "Edit Smart Group," under "Edit," is always grayed out.
When I try to drag a specific contact into the Smart Group on the sidebar, that does not work.
No matter what I try, "Edit Smart Group" remains grayed out.
Big Sur iMac late 2017
iMac 21.5″, macOS 10.14