Before I start writing about the error, I\'m running on macOS Sierra and using Xcode 7.3.1.
So I\'m creating an Archive from my App, I validate the App and it passes
I have also experienced the same. This is the simple way to solve your problem. Archive your app using Xcode 7.3.1 and export the ipa file of your app into a directory by selecting the option Save for iOS App Store deployment.
After that open Xcode 8.0 and open Application Loader from Xcode -> Developer Tools. Sign in to your team, and upload the ipa file using Xcode 8.0.
I have uploaded two apps to iTunesConnect, it will work for sure.