Hello Apple Developer Support Team, I’m facing an issue stapling notarization tickets to my signed macOS installer package (.pkg). What I’ve done so far: Code-signed my .app with Developer ID certificate. Created a signed installer package (.pkg) using pkgbuild. Submitted the package to Apple notarization via xcrun notarytool submit ... --wait. Status: Accepted. Tried stapling using xcrun stapler staple -v IPMPlus_Arm_Installer_signed.pkg, but it fails with Error 65. xcrun stapler validate reports no ticket stapled. Observations: Curl tests to CloudKit endpoints return 404 or NOT_FOUND errors. Port 443 connectivity to api.apple-cloudkit.com and gs.apple.com works. Retried stapling from multiple networks, including a mobile hotspot. Same result. System time is synced; package signature is valid (pkgutil --check-signature). Questions: Is this a known issue with stapler / CloudKit endpoints? Is there a workaround to successfully staple a notarization ticket to a signed .pkg? Any guidance would be highly appreciated.