While this mod can be extremely useful, it can be a bit finicky due to the amount of work that goes into it. MC Command Center is a mod in the Sims 4 that allows players to have a much higher level of control over their game. But what do you do when it stops working? Here's what we recommend, with distinctions depending on your exact problem. One of the most popular mods for the game is MC Command Center. We love using mods in The Sims 4, as we're sure you do as well.