Hi folks, We're building a Safari web extension and experiencing an issue to see it among extensions in Safari after installing the container app to /Applications and launching it. The app and extension is notarized and signed with Developer ID After an extensive investigation, we found the following log records in the Console app (the extension ID is redacted): Computing the code signing dictionary failed for extension with identifier com.youcompany.safariext Blocking extension with identifier: com.youcompany.safariext To debug the issue, we've created a HelloWorld-like extension generated by Xcode 12.2 beta 4 (http s://sharedartifacts.s3.eu-central-1.amazonaws.com/safariext.app.zip contains a signed app bundle) It also is under the same code signing issue. According to https://developer.apple.com/documentation/xcode/notarizing_macos_software_before_distribution/resolving_common_notarization_issues, we've run a few checks to verify: code signature ➜	Desktop codesign -vvv --deep --strict ./safariext.app					 ...-prepared:/Users/nikolay/Desktop/safariext.app/Contents/PlugIns/safariext Extension.appex ...-validated:/Users/nikolay/Desktop/safariext.app/Contents/PlugIns/safariext Extension.appex ... ./safariext.app: valid on disk ./safariext.app: satisfies its Designated Requirement signing certificate ➜	Desktop spctl -vvv --assess --type exec ./safariext.app		 ./safariext.app: accepted source=Notarized Developer ID origin=Developer ID secure timestamp ... Timestamp=25 Nov 2020 at 22:23:54 ... We seemed to have all checks good, the extension can be installed only if Safari is allowed to run unsigned extensions. Could anyone assist to debug/resolve this issue? Thanks