I have the same problem and I am seeing other related issues in different forums. Moving away from cocoapods is not viable for me right now. Can I still do archive releases from the 14.2 xcode if I download it from the developer portal, I know in the past sometimes you cannot release from those versions and this is holding up getting out updates. Anyone else come up with other fixes for this? It looks to be a symlink issue fo some sort. Maybe removing intermediates or something. I will update back here if I figure anything out.

The issue magically resolved itself when we attempted again yesterday. Appears to have just been a bug on the site.

I apologize, "one of them result in a successful creation" should read "NONE of them result in a successful creation". I don't see a way to edit the question. I also have a screenshot of the error that I can throw up on s3 if anyone is interested in seeing it.