Xcode 6.4 Export Adhoc "Session has expired"

Looks like Apple has some kind of technical issues today. It's not related to version of XCode. I see the same error with XCode 7.0.1 right now. Re-adding account will not help.

Had the same issue. One of the accounts in Xcode (7.1) needed to be logged into again - not sure why. In Xcode preferences, went through the accounts and one said to login. That fixed it.