I got this error today when trying to upload from Xcode 6. The app I tried to upload was developed for another customer, but I was admin on their account. But, now my personal Apple Developer Subscription has expired. I'm still admin on the clients account, so I could login, validate builds, download provitioning profiles, etc, but when I tried to submit I got the error described above.
My solution was to remove my own Apple Id and instead login using my clients Apple Id directly.
