Strange Errors on Archive Validation

I had the same problem with Xcode 8.2 while submitting my application:

 ITunesSoftwareServiceAuthenticationErrorDomain error 434.

Solution: I switched to different network and it worked for me.

Bump the build number and validate again.

Had the exact same problem. I tried upgrading to Sierra which seemed to update bits of Xcode etc. The new error message was formatted differently, so I could not see the "434" (With 1 success in 15 attempts (I had to tweak a version number in a string in the app, so didn't choose to upload after that brief moment of joy), i just uploaded the archive anyway, and after 2 hours of processing, it was accepted. I will update when my new app version is live to verify this error can be safely ignored, at least in some cases (e.g. I checked all my graphics' color profiles, etc.).

Do the below steps :-
1. Analyze the project. (From Product Menu)
2. Click on Archive. (From Product Menu)
3. Select the development team for provisioning.
4. From summary window unselect "Include bitcode" and click on Validate button.

Now, It will working fine.