How to Handle “Unable to authenticate with App Store Connect (Code=1)” in Xcode Cloud

An Xcode Cloud workflow that uses Xcode 27 beta 5 can fail while exporting an archive for App Store distribution because the service cannot authenticate with App Store Connect. This article uses the actual diagnostic reported on Apple Developer Forums to explain how to isolate the failure, which responses are safe, and how to verify recovery.

Error message
Cause
Affected conditions and versions
Recommended troubleshooting steps
Workarounds
How to verify the result
Cautions
Summary
Official references

Error message

App Store Connect request for store configuration failed for account Session Proxy Provider
(Account "Session Proxy Provider": Unable to authenticate with App Store Connect
(Error Domain=DVTITunesSoftwareServiceFoundation.DVTServicesSessionProviderCredentialITunesAuthenticationContextError Code=1 "(null)"))

The failure occurs during the Xcode Cloud export stage. Related details can appear in IDEDistribution.critical.log and DVTITunesSoftwareService.log.

Cause

The diagnostic means that Xcode Cloud’s session proxy could not establish an App Store Connect authentication context. Apple has not publicly confirmed the underlying cause in the forum thread, however, and no fixed release is identified there. It is therefore unsafe to conclude that a certificate, provisioning profile, or Apple Account credential is necessarily corrupt.

Important: In the reported case, distribution from a local installation of the same Xcode 27 beta 5 succeeded while Xcode Cloud failed. If local distribution works, investigate the Cloud-specific authentication path before replacing signing assets.

Affected conditions and versions

An Xcode Cloud workflow configured to use Xcode 27 beta 5
The archive export step for App Store Connect distribution
The reporter reproduced the failure with two App Store Connect accounts
The report was posted on August 13, 2026, with Feedback Assistant reference FB24286100

As of September 28, 2026, Apple has not publicly confirmed a root cause or a fixed Xcode release for this report. Do not assume that a particular Xcode 27 build resolves it without testing an actual Cloud workflow.

Recommended troubleshooting steps

Check App Store Connect account state: Verify that agreements, tax and banking tasks, and the Apple Developer Program membership are current. Confirm that the account has a role allowed to distribute the target app for the selected team.
Compare Cloud with local distribution: Archive the same commit with the same team and Xcode version locally, then attempt an App Store Connect upload. If only Cloud fails, the evidence points away from a general project-signing failure and toward the Cloud path.
Inspect the Cloud logs: Download IDEDistribution.critical.log and DVTITunesSoftwareService.log from the failed build. Search for Session Proxy Provider, Unable to authenticate, and Code=1.
Test another workflow Xcode version: If the project supports it, temporarily pin the workflow to a version that previously completed distribution. This is an isolation step and a possible workaround, not an Apple-confirmed fix.
File feedback with Apple: Include the failed Cloud build URL, timestamp, Xcode version, team and app identifiers, and sanitized logs. You can mention the existing reference FB24286100 as related context.

Workarounds

If the failure is limited to Cloud distribution and your organization’s process permits it, create the archive locally and upload it to App Store Connect from Xcode Organizer until the service path recovers. You can also pin the Cloud workflow to the last compatible Xcode version that you have verified as successful.

A retry may succeed if the service failure is temporary, but it is not a durable remedy. Deleting and recreating credentials or certificates first can break a local distribution path that is still healthy.

How to verify the result

The Xcode Cloud export stage completes successfully
Unable to authenticate with App Store Connect and Code=1 no longer appear in the logs
The build reaches App Store Connect or TestFlight
Cloud and local distribution produce consistent results for the same commit

Cautions

If the logs also show that the app-store export method is deprecated, treat that warning separately from the authentication failure. When you control the export options, consider migrating to app-store-connect, but changing the method name alone is not proven to repair the Session Proxy Provider authentication error.

Summary

Unable to authenticate with App Store Connect (Code=1) in Xcode Cloud indicates that the Cloud session proxy could not establish App Store Connect authentication. Check agreements and roles, compare the same archive locally, and inspect the Cloud distribution logs. Until Apple publishes a root cause or fixed version, treat pinning a previously working Xcode version or uploading locally as conditional workarounds.