JS error in IE 11

Hi,

the javascript throws an error that cause the IE 11 to stop working (regarding the fadeIn).

Console error: SCRIPT65535: Argument not optional

error suppost to be in this line (line number 286):
ni = document.createNodeIterator($current_form[0], NodeFilter.SHOW_ELEMENT);

Using plugin version 1.7

I downgraded to an older version and it works but should be fixed of course ??
I read the other thread about IE error but in my case the checkbox values are the same as the conditional values