Cannot save to Scripts folder

Problem:
Trying to save a script to /Library/Scripts fails with the following error message.

Screen Shot 2564-03-02 at 22.02.04

Expected Behavior:
SD should cause macOS to throw an authentication dialog.

Additional Notes:
SD8 has Full Disk Access permission.
Build: 8A23
macOS: 11.2.2
Arch: arm64