Hi,
Not sure if IE 11 is a supported target but in the index.html code, the line:
xml.responseType = 'arraybuffer';
is throwing an exception InvalidStateError. (The line num seems to be 130 as per the debug console).
Seems to work fine in Edge, though the loading indicator on the browser tab never stops spinning, even though the page is loaded and running.
This test is just using a blank project with no extras.
-dev