scratch-gui: Raspberry Pi - Stage fails to load

Expected Behavior

When Scratch UI is opened the default sprite appears on the stage.

Actual Behavior

The default sprite doesnt appear and the stage is blank

Steps to Reproduce

Open llk.github.io/scratch-gui on a Raspbery Pi running Raspbian Stretch

Operating System and Browser

Raspberry Pi Raspbian Stretch Chromium - Version 60.0.3112.89 (Developer Build) Built on Ubuntu 14.04, running on Raspbian 9.1 (32-bit)

Developer mode noted 3 errors while loading:

raven.js:55 You are currently using minified code outside of NODE_ENV === 'production'. This means that you are running a slower development build of Redux. You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify or DefinePlugin for webpack (http://stackoverflow.com/questions/30030031) to ensure you have the correct code for your production build.
a.(anonymous function) @ raven.js:55
o @ lib.min.js:51
(anonymous) @ lib.min.js:51
(anonymous) @ lib.min.js:51
t @ lib.min.js:46
(anonymous) @ lib.min.js:61
t @ lib.min.js:46
e.exports.t.a @ lib.min.js:61
t @ lib.min.js:46
e.exports.e.exports @ lib.min.js:46
t @ lib.min.js:46
e.exports.t.a @ lib.min.js:61
t @ lib.min.js:46
(anonymous) @ lib.min.js:56
t @ lib.min.js:46
e.exports.Object.defineProperty.value @ lib.min.js:51
t @ lib.min.js:46
e.exports.Object.defineProperty.value @ lib.min.js:51
t @ lib.min.js:46
(anonymous) @ lib.min.js:46
(anonymous) @ lib.min.js:46
t @ lib.min.js:1
(anonymous) @ lib.min.js:100
t @ lib.min.js:1
(anonymous) @ lib.min.js:35
t @ lib.min.js:1
123 @ index.jsx:5
t @ lib.min.js:1
window.webpackJsonp @ lib.min.js:1
(anonymous) @ gui.js:1

(index):1 Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause().
Promise (async)
Blockly.WorkspaceAudio.preload @ lib.min.js:79
l @ lib.min.js:79
a @ lib.min.js:79
d @ raven.js:416

(index):1 Uncaught (in promise) DOMException: The play() request was interrupted by a call to pause().
Promise (async)
Blockly.WorkspaceAudio.preload @ lib.min.js:79
l @ lib.min.js:79
a @ lib.min.js:79
d @ raven.js:416