From the Library Vault, attempting to add any asset pack seems to be failing to add those assets. Each asset shows compatibility with 4.9 and 4.10, but a blank project of each of those versions fails to have the assets that the Vault claims to have added.
If adding an asset pack has failed, there should at least be a dialog box to indicate failure and reason for failure.
These are all free asset packs I got from the Marketplace, such as the Animation starter pack, or any of the various Infinity blade asset packs.