Since updating to Xcode 11.0 yesterday, I've been unable to upload my app. The only error message I get is "App Store Connect Operation Error". Nothing else shows in the log.
Previously (i.e. using Xcode 10) I uploaded several archives of this same app without any trouble. The current archive was created with Xcode 11, and validates without any complaints.
Is anyone else having this problem at the moment? When I google about it, I see that it has occurred periodically in the past when Xcode has been updated.
P.S. The error occurs consistently during the upload process, when Xcode is waiting for a response after sending API usage data.