@Mad Pirest You need to reinstall the Expansion Mod! 1.Stop your Server and delete the Expansion Mod and Expansion.json file in config folder as well! 2.Reinstall it and load up into the mod folder the hole mpmission folder! 3.Start your Server. I had the same issue when I loaded the Chiemsee Map Mod or Deer Isle Only when I copied the mpmission folder to the mod folder and then started the server, it worked