Building Lighting is always 0%,Why?

I built really simply office box space in my map. And whenever I hit the button build, the Building Lighting process is keep telling that the progress is 0%. How can I solve this problem? I am a beginner on this engine and many thanks if someone could help me out on this.

Go into your system tray at the bottom right hand corner and select the yellow icon called ‘swarm agent’. Open it up and click on the left tab ‘Log’ this should provide you with a bit more detail on what is your problem