The local storage server is protected
Mapped localServerProtected when an admin action is not allowed on the built-in local server.
Why this happens
Protects the primary local backend from destructive or invalid conversions (delete, some trash ops, CDN mark, reserved id clashes).
Diagnose and fix
1. Use allowed local settings only (Manage the local storage server).
2. Perform scale-out with new remote/CDN servers instead.
3. See the specific cannot-delete / cannot-CDN / cannot-restore siblings for the exact action.
4. See This id is reserved for the built-in local storage server.