Hi everyone, I've been trying for a few days and still getting the same errors..so any help would be appreciated!! I've got the app to pass the Validation in XCode Organizer, but after I uploaded to Apple Store Connect through the Organizer, I'd get an email with errors, ITMS-90238: Invalid Signature, mentioning a long list of plugins, and then ITMS-90296: App sandbox not enabled. I'm not sure how to investigate these problems, so I've been just blindly trying everything. I've added the Sandbox capability in Xcode and have the entry in the entitlement file. The app even shows Sandbox Yes in Activity Monitor. This is an Qt app. I generated an Xcode project using qmake, then use Xcode to sign and upload. I tried both manually selecting the profile and letting Xcode manage signing automatically. I've tried both Distribution profiles and Development profiles. It was giving build errors in signing unless I used the --deep flag in Other Code Signing Flags. Then I read online that it's not recommended. So I've tried using the -codesign option in the Qt's mac deployment tool, macdeployqt. It passed the validations but still gives the same error. I suspect it's doing a codesign --deep internally. This is how I'm using macdeployqt macdeployqt myapp.app -qmldir="$SOURCE_DIR"/qml -always-overwrite -appstore-compliant -codesign="$SIGNING_CERT" Any advice would be much appreciated!! I'm on macOS Sonoma 14.0, Apple M2, Qt 6.5.3