Wish they put this on their status page - just wasted hours trying to figure out what's going on...
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The above fixed it for me: Add the ITSAppUsesNonExemptEncryption key to your app’s Info.plist file with a Boolean value that indicates whether your app uses encryption. Set the value to NO if your app—including any third-party libraries it links against—doesn’t use encryption, or if it only uses forms of encryption that are exempt from export compliance documentation requirements. Otherwise, set it to YES. Once I did that my build became available.