If you do not have the latest game updates, see the 'Game Updates' section in this article. If you do not have expansion packs installed, you have to purchase them or join another game. If you already running the latest game updates, and if you have the same expansion packs installed as another player with whom you are trying to play, remove and then reinstall the game to resolve this issue. You are running an unsupported version of the game, and the game executable was modified.
This issue may occur for one of the following reasons:Īnother person with whom you are trying to play has different expansion packs installed.Īnother person with whom you are trying to play has different software updates installed.Īnother person with whom you are trying to play has different modification (mods) installed.
