localhost:8000 internal server error and nodebox issue

[jessicasevans]

Typing in localhost:8000 returns with either an "internal server error" or "this page cannot be displayed".

https://www.nodebox.net/code/data/media/linguistics.zip cannot be downloaded from terminal:

WARNING: certificate common name codestudio.be' doesn't match requested host na me www.nodebox.net'.
HTTP request sent, awaiting response... No data received.
Retrying. (it eventually gives up).