I get a Missing Dependency on all of the items in the Speed Tree Group. Also, get it on the SpeedTreeGroup09 which appears to contain the common elements for the trees and may be the reason for the Group level error.. Since these are built-in items there is very little you can do with them. Open Edit and Revery to Original had no affect. So, is there a way to reload the Built-In Speed Tree library and any other items that are needed with this asset group?