xcode 에서 앱스토어 앱 업로드 실패할 경우 대처

This only started happening to me today (May 2017) and no answers in this thread solved my issue. The resolution for me was from here;

https://forums.developer.apple.com/thread/76803

Open Terminal. Change to home directory,

cd ~  

Move the current transporter directory,

mv .itmstransporter/ .old_itmstransporter/ 

Invoke the following file to let Transporter update itself.

"/Applications/Xcode.app/Contents/Applications/Application Loader.app/Contents/itms/bin/iTMSTransporter"

Wait till it updates, then open Xcode and attempt upload.