Did you already got the game to work one time or does it always happen when you try to start the game?
It actually doesn't belng into this thread, there isn't any file missing. Try changing the render subsystem,
perhaps that works, but I don't know.
Edit: Quote from Shell's ogre exception thread:
OGRE EXCEPTION(7:InternalErrorExeption): Internal logic error. This should never happen. If you see this, you have found a bug, or your computer's hardware is unstable.