Many thanks for the info and link - much appreciated.
I've now been able to try this in IE11 - and get the same result!
When using IE11 (the latest version which is set to auto update) my Muse draft site at Home gives the following dialogue:
MuseJSAssert: Error calling selector function: Error: Invalid argument
If you click OK on the displayed dialogue box you can see the page. However the same error dialogue box is displayed on each new page view, and, as an example, the drop down info panels Resource library don't drop down to reveal the text.
I can (kind of) understand the fact that Muse might not work with an ancient PC browser (even though apparently over 21% of people still use IE8 Browser market share). But what is stopping IE11 users from displaying as expected?