I tried to distribute my app to AppStore Connect with organizer "Distribute App" button.
Upload failed with theses errors. First error and warning are okay.
But the second error isn't cool..
We can't distribute app build from XCode beta ?
Short answer: no.
At some point, Apple will release a GM version of Xcode 10 and you will get an email saying you can now submit your builds. Until then, Xcode beta is solely for development/testing, and not distribution.
来源：https://stackoverflow.com/questions/51488827/distribution-failed-with-xcode-10-beta-4-error-itms-90534