Same here. We started seeing this error in the logs on Jan 5, 2022. The error is also accompanied with a top-level workflow error stating: "The Archive - macOS action could not complete due to an error. Something went wrong and the Xcode Cloud team has been notified to investigate. The error may not occur on rebuild." This problem started occurring on both iOS and macOS workflows, and subsequent rebuilds have not completed successfully.

Bugs can be submitted using the Feedback Assistant tool: General Overview: https://developer.apple.com/bug-reporting/ Web app: https://feedbackassistant.apple.com/ Instructions for installing/accessing the native app (from overview page): "The app requires iOS 12.4 or later, iPadOS 13 or later, or macOS Catalina or later. On beta versions of iOS and iPadOS, the app is available by default on the home screen. On publicly released versions of iOS and iPadOS, you can enable the app by installing a beta profile. All versions of macOS include the app in /System/Library/CoreServices/Applications, and it can be launched with Spotlight or the URL scheme applefeedback://. When enrolling a macOS system in beta builds with the Beta Access Utility, the app is added to the Dock and aliased in /Utilities." I submitted a new bug using the tool this morning. Wouldn't hurt for others to file their own versions as well.

Looks like things are working again. Apple responded to my Feedback ticket this morning stating there was a known outage that has since been resolved. Artifacts are now saving correctly and builds no longer time out.

I just submitted another ticket as well: https://feedbackassistant.apple.com/feedback/9878685

Experiencing the same issue on Feb 2. System status page shows all systems green. New issue filed here: https://feedbackassistant.apple.com/feedback/9878685