I started to experience this issue three days ago - it literally came out of the blue. I've tried cleaning all possible caches, installing different versions of Xcode, and in the end went as far as to reinstall macOS completely. When this error appeared again after the clean install I was flabbergasted and devastated. I'm happy to learn that I'm not the only one facing this poltergeist. Hope Apple releases a fix soon.
Topic:
Developer Tools & Services
SubTopic:
Xcode
Tags: