After uploading my app to the Applestore, I get this email from Apple:"To process your delivery, the following issues must be corrected: Invalid Swift Support - The SwiftSupport folder is empty. Rebuild your app using the current public (GM) version of Xcode and resubmit it. Once these issues have been corrected, you can then redeliver the corrected binary." I'm running on the most currect version of Xcode, I do not use Swift & am told the issue is from the UrbanAirship product. Can you please let me know if you have a fix for this issue?