it looks like a bug in news.arc. In a first time, you can just comment (or remove) the string "news.arc" in the file libs.arc. You won't be able to use the news application however, but to run the tutorial you don't need it.
Exactly. Sorry, I never realized that adding news to the libs
would break the tutorial. In future, if anyone notices a bug this major, please email me about it or at least post something here.