I purchased this game today on Steam for my son and I to play coop . However, when we click for the multiplayer it won't let us play together. The error keeps coming up that "simulation frame work does not match and I may be playing an older version of the game from the storefront", along with a bunch of lines that are say things that are above my computer knowledge. My game is as updated as can be from Steam today. Any help would be appreciated. Thank you.
