I was about to upload an app to iTunes connect using Xcode 8.3.2 (8E2002) and has been stuck at the stage of "Authenticating with the iTunes Store" and got an error -22421. Recently I uploaded the app and its got successfully uploaded but after updating the Xcode version got this issue.
I have validated the app, and it got succeeded.
Are there any solution or suggestion for this case?
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Abhishek singh
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Possible duplicate of [Application Loader stuck at "Authenticating with the iTunes store" when uploading an iOS app](https://stackoverflow.com/questions/22443425/application-loader-stuck-at-authenticating-with-the-itunes-store-when-uploadin) – Nagendra Rao Jul 13 '17 at 17:40
3 Answers
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Try this, it fixed it for me. Open Terminal and run:
- cd ~
- mv .itmstransporter/ .old_itmstransporter/
- "/Applications/Xcode.app/Contents/Applications/Application Loader.app/Contents/itms/bin/iTMSTransporter"
iTMSTransporter will then update itself, then you can try uploading in XCode again.

Abhishek singh
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You can find the same solution on the Apple Dev forum
It works for me, wait 3 or 4 minutes.

sKuD sKuD
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Seems an inherent problem with 'Upload to App Store' item, I instead used Xcode > Open Developer Tool > Application Loader and it did the job in no time.

Naveed I
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