How can I copy/paste the character and setting sketch templates?

How can I copy/ paste the character and setting sketch templates? I was always able to in the past. What have I done wrong now?

What did you do differently this time? Or: How are you doing it to begin with? From where to where?

Select a Template and right-click it. Choose Duplicate from the context menu. That should work.
Essentially they’re just documents in a special folder.