Codemagic failed to publish Error: code -22020

Question

My build failed using Codemagic with the Error code -22020 after building the whole app.

 Successfully created archive at build/ios/xcarchive/Runner_4myti30z.xcarchive
Export build/ios/xcarchive/Runner_4myti30z.xcarchive to build/ios/ipa
Execute "xcodebuild -exportArchive -archivePath build/ios/xcarchive/Runner_4myti30z.xcarchive -exportPath build/ios/ipa -exportOptionsPlist /Users/builder/export_options.plist COMPILER_INDEX_STORE_ENABLE=NO"


▸ Export Succeeded

Successfully exported ipa to build/ios/ipa/Runner.ipa
Raw xcodebuild logs stored in /tmp/xcodebuild_logs/Runner_x1541cb8.log

Then in the publish part it drops me an error at the end

== Gathering artifacts ==


== Publishing artifacts ==

[skipped]

Publishing Runner.ipa to App Store Connect

/usr/bin/xcrun altool --validate-app -f /Users/builder/clone/build/ios/ipa/Runner.ipa -t ios -u *********@hotmail.com -p @env:APP_STORE_CONNECT_PASSWORD --output-format normal

    2020-09-01 08:48:58.794 altool[31554:179398] *** Error: Unable to validate archive '/Users/builder/clone/build/ios/ipa/Runner.ipa'.
    2020-09-01 08:48:58.794 altool[31554:179398] *** Error: code -22020 (Unable to validate your application. We are unable to create an authentication session.)



Failed to publish to App Store Connect


Build failed :|


Publishing failed :|
Failed to publish to App Store Connect

Answer 1

The most common reason for the occurrence of this error message is using Apple ID password instead of app-specific password in App Store Connect publishing settings.

To generate an app-specific password, sign in to your Apple ID account page, navigate to the Security section and click Generate Password… below App-Specific Passwords. The generated app-specific password will be in this format: abcd-efgh-ijkl-mnop. Insert this value into the Codemagic UI or as a password in codemagic.yaml when setting up publishing to App Store Connect.

Note that the password should be generated with the same Apple account that you are using for publishing.