When I try to open it directly in the local file-system in Safari on MacOS I just get a white screen (works fine in safari though):
Safari Version 11.0.3 (13604.5.6)
these lines are in the the error log:
[Error] Not allowed to load local resource: file://fonts.googleapis.com/css?family=Lato
[Error] SecurityError (DOM Exception 18): The operation is insecure.
get (artemis.min.js:29:366)
(anonyme Funktion) (monogatari.js:157)
first line looks related to @import url(//fonts.googleapis.com/css?family=Lato); in main.css. Is there a missing https: at the start?
the second one seems to be a bug in Artemis - something to do with localstorage sandboxing looks like.