I'm getting the same thing. Same situation as well, where I haven't changed any libraries or made any major changes since my last build a few days ago. Earlier today, I couldn't upload at all with various "Unexpected Status Code" type errors. Now it's uploading, but I'm getting these emails. It's probably on Apple's side. Searching the internet turns up quite a few posts on various repository and library pages about this error over the last month or so.