Strict Standards: Only variables should be assigned by reference in mod_jux_layerslideshow.php on line 18

I have this error and cant find.. I read and follow all steep docs.joomlaux.com/extensions/jux_layer_slideshow/ but cant solve

Hi Victor,
Thanks for contacting us and choosing our product!
As I replied to you on ticket
About your problem with jux layer slideshow I fixed it for you by change:
From: $document= &JFactory::getDocument();
To: $document= JFactory::getDocument();
on line 18.
Hope this help!