Export Compliance update.
All TestFlight builds now require Export Compliance information. You can upload your Export Compliance documentation by visiting the new Encryption section in Features. Once your documentation is approved, you will receive a key string value to add to your build's Info.plist in Xcode so that your app will reference the associated documentation.
If you need to update your export compliance documentation, you can do so at any time by visiting Encryption. Be sure to add the new key string value to your build's Info.plist and resubmit your build.
Learn more about uploading and managing your Export Compliance documentation in iTunes Connect Developer Help