Stuck at the "Syncing data for Forza Horizon 2..." screen.

Like the title says…

It’s more of a pop-up than a screen, it appears above the start screen with the hurracan and the “press A to start” line.

When I press home, the pop-up remains on screen, covering most of the x1 UI.

What can I do to fix this?

Thanks

(it’s been stuck there for ~10mins now)
(also note, the console isnt hardfrozen, I can still go home, and the backdrop is still animating through all the cars/scenes)