Hi there, a little while ago I created a level in the World Editor, it all worked just fine. Now today, I made a few small changes to the level, compiled the level and tried to run it, but... some parts of the level are just plain black and other parts are looking just fine. Now I tried compiling the lights alone, but then it gives me an error:

---CRITICAL ERROR---
ERROR - Can't update lights by using meshes.

Press any key.

Does anyone know what the problem is and what I can do about it?