Not working for Modernize theme

Hi there,

The plugin is not working for my theme and i don’t jonw why i am not good in JS…

Here is the website http://www.mapreussite.com/

I tried to add :
else if
{
jQuery(“.lowermedia_add_sticky”).sticky({ topSpacing: 0 });//#default
}
else jQuery(“.main-navigation-wrapper”).sticky({ topSpacing: 0 });

at the end but still not working.. any suggestion ?
Thanks

https://ww.wp.xz.cn/plugins/lowermedia-sticky-js-menus/