I got this error, while trying to upload archive to App Store:
A downloaded software component is corrupted and will not be used. https://contentdelivery.itunes.apple.com/transporter/repositories/j2se8/1.12.0/bundles/com.apple.transporter.mediatoolkit-1.12.0.jar
I'm using Mac High Sierra, have all latest updates for Xcode, I'm not sure about which kind of corrupted software is error about.