I think this bug comes from the last update of chrome.
I use Chrome 52.0.2743.116 m (64-bit) with --allow-file-access-from-files, loading a scene from local folders.
I have the error with BJS 2.5 alpha, using src='http://www.babylonjs.com/babylon.js'.
If I use BJS 2.4.0 (using src='http://cdn.babylonjs.com/2-4/babylon.js'), it works.
The error post Uncaught Error: Error status: 0 - Unable to load scene.babylon / e.onreadystatechange @ babylon.js:3