I have not been able to upload my app to App Store Connect using Xcode 13.2.1 for the past few hours.
Steps to reproduce the problem:
Windows > Organizer > Distribute App > App Store Connect > Upload
I have tried to repeat the process multiple times. Xcode would return different errors on each attempt:
Error Fetching App Record: App record request failed with error: "Unexpected Status Code"
App Store Connect Operation Error: Unable to authenticate