Game failed to check for updates

I played FH4 yesterday without a problem. Today it says this:

nullERROR

I can access the game but i can’t play online, My VIP status is no longer there and all the DLC cars (I bought the ultimate version of the game) What should I do??

Hey Gaju,
I had the same problem a couple of days ago: all DLC cars gone. I then went into the Xbox store and looked the stuff up et voilà: it said owned and offered the install button again. So I clicked that and reinstalled VIP and all the cars. After that, everything was back to normal. I have no idea why this happened but could be related to moving the whole game incl. all DLC stuff from USB to internal, though that was earlier and I played after that without probs.
Maybe you’ve just experienced a similar glitch?