In Once Human, every player has their own territory, which is a personal plot of land where they can build different buildings and structures. All objects, from furniture to Isolated Securement Units for your Deviants, occupy a certain amount of space within this territory. Once you reach the territory limit, youll get hit by the annoying Space Full, Unable To Place More error that prevents further placement. Thankfully, there are a few ways to fix this error so that you can continue building and expanding your territory in Once Human.