Error ITMS-3000 Uploading to TestFlight

I am attempting to use Testflight Beta to host an iOS 9 beta app with WatchKit 2 support (as it appears should be acceptable). However, when trying to submit the build to testflight, I recieve an ITMS-3000 error every time.


The error is: ERROR ITMS-3000: "Line 7 column 28: attribute "app_platform" not allowed here; expected attribute "verified_under_3_0", "verified_under_4_0" or "verified_under_version" at XPath /package/software_assets"


Does anyone know how to fix this? I've looked through all the .plist files and build settings and cannot find app_platform anywhere.

Other people are having the same problem in this thread: https://forums.developer.apple.com/message/22442#22442

3000 is too generic to be of any specific help and the list of possible issues is typically too long to go over here, so start with the typical LHF such as special chars in app/asset names, etc.

Error ITMS-3000 Uploading to TestFlight
 
 
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