I'm working with TFS 2010 and Project 2010 Feature Integration pack and the Scrum for Team System v3 process template. Within the Project Server tab, I'm trying to set the default value for "Submit to Project Server" and "Enterprise Project" (which works fine), but when the Project Backlog Item is created/saved, it always fails when trying to sync with Project Server with the error message in the title of this post: TF285017: The Assigned To field cannot be blank.
I've Googled the error code, and it seems like there is no documentation for it anywhere. Can someone help?