I have dowloaded this game about 2 weeks ago and really enjoying it, i went on it today to continue the single player, I'm on the level island where i have unlocked all garages and watchpoints, but when i click continue i get the error message 'Unable to continue session, because required DLC is missing!'

I have downloaded the game as part of the Xbox Game Pass and didn't install any other DLC for the game after installing it. I really don't understand why am getting this error message, if anyone could help with this that would be great.