The problem has been resolved. This problem occurred in the process of building a Unity project into an XCode project and archiving it into bundle. Here's how I did it to resolve it.. rebooted my Macbook Air. rechecked the Unity project's certificate settings (iOS). I had proceeded with a new iOS build. opened the XCode project and proceeded with "Clean Build Folder" cleaned up the "Derival Data" folder. (Manually) Finished setting up categories and certificates, and proceeded with the archive. Processing was successfully completed on the server after the upload was completed. I don't know if it was a temporary problem or if there was a problem with some files in the Unity project.