Error “transporter” when uploading into Appstore

I got this problem, when uploading my App into Appstore, through Transporter and XCode.

This error is caused by renaming the username in Laptop, and the old path is not changed (based on new username). The path still pointing into

“/Users/{OLD_USERNAME}/Library/Caches/com.apple.amp.itmstransporter/obr/2.1.0/com.fasterxml.jackson.module.jackson-module-jaxb-annotations-2.9.8.jar”,

while the new path should be

“/Users/{NEW_USERNAME}/Library/Caches/com.apple.amp.itmstransporter/obr/2.1.0/com.fasterxml.jackson.module.jackson-module-jaxb-annotations-2.9.8.jar”.

To solve this, we just need to remove /Users/{OLD_USERNAME}/Library/Caches/com.apple.amp.itmstransporter entirely. And then just try to re-archive and re-upload into Appstore. Then it will trigger creating the new transporter in the right path, and automatically pointed into the new one.

PS: Thank cleardemon, for posting this info in developer apple forum!