I've just renewed my mebership yesterday, and I had to create a new Certificate and Provisioning profile for this app I'm developping. I just tried submitting a new AdHoc version (for TestFlight testing), and I've been getting this error:
ERROR ITMS-90534: "Invalid Toolchain. New apps and app updates must be built with the public (GM) versions of Xcode 6 or later, macOS, and iOS SDK or later. Don't submit apps built with beta software including beta macOS builds."
I'm running MacOS 10.12.2 Beta, XCode 8.3 beta 3
I've submitted more than 5 AdHoc builds previously on the same OS version and XCode 8.3 beta 1
I've read on some other threads that this could be a potential bug on Apple's side, and has to do with some server/OS whitelisting they need to do.
But any deterministic answer is fully welcome here! Maybe someone else is also facing this issue ?!