If you are trying to upload your IPA file using the Application Loader and this shows this message "Application Loader is unable to upload your package".
Follow this steps to upload your IPA file.
1.- Login to App Store Connect.
2.- Click on the "My Apps" button.
3.- Click to "+" to add an app.
4.- Select "New App".
5.- Select the iOS platform and complete all the fields related to the new app.
After you add this app to your App Store Connect you can upload your IPA file using the Application Loader program.
Just try to upload the IPA file again, now it will not show you any error.
If you follow all the steps, the final screen you should see is this one.
If you need anything else from your Ordering Team, just let us know 👍
Have a Happy Ordering