Enabling world composition breaks game

Hi. I am currently learning how to use world composition, but things are not going well. I am making use of the third person template for my project. I can make a new persistent level that has very little in it. A simple flattened cube to run around on, a playerstart, a sky box, sky light, and directional light. Running this level works perfectly fine to test, however the moment I tick world composition I can no longer attempt to run the game as it will always become unresponsive. Any help would be very much appreciated.