Since the introduction of new inventory mechanics yesterday (great job to all involved!), I'm unable to claim gifted and giftable EP stacks into inventory.
In the inventory screen, only Send and Details are available. By selecting Details, the only option is Close (to close the details popout).
Send only allows you to forward the EP pack to others, and is ineligible to use on self.
In this instance, I have an EP gift that has been sent to me, the inventory screen shows that gift, the person who sent it, but the only option is to send that on to somebody else - in a very elaborate pass the parcel!
I have a bloodline or better package, and claimed on my account (ie not bundled).