For about eighteen hours, between Thursday evening and Friday afternoon (November 19 and 20), a script's download link may have errantly pointed to an earlier version. As a result, the downloaded script may not work on macOS 10.15 or later.
The problem that caused the issue is fixed and I apologize for the difficulty. If you downloaded a script during the time above you will simply have to re-download it. The earlier inoperative version you downloaded can be Trashed.