Im trying to publish my app through application loader, but I keep on getting this error. I've tried this solution however I still get the same error.
Any suggestions would be appreciated.
I found out the build I was trying to upload was archived in Xcode beta 6 :/ Upgrading to the GM seed solved my problem. Also make sure Embedded Content contains swift code is set to "NO" in your build settings for your extension and set to "YES" in your build settings for your containing app.