Microsoft has released a new version of the Crackdown 2 add-on which was causing problems for players.
As reported last week, the downloadable content made the game crash and introduced a couple of bugs.
"These issues were caused by problems mastering the DLC package," reads a statement on developer Ruffian's website.
"They have now been resolved with a new version of the Toy Box DLC that Microsoft has released."
If you've already downloaded the DLC, you'll need to delete it from your system and re-download. Then everything should be fine.