Hello Saguaros, here is the answer from Stackideas team:
From what I checked, that is the EasyDiscuss toolbar mmenu.js script that pushes the content into this div "mm-page mm-slideout" after the < body > tag.
May I know is it possible to adjust their Javascript to find the element if under this parent div (screenshot: https://take.ms/7jT6E )?
Because I did try to exclude some of the id or class element from the script, it seems like still can't make it work. (screenshot: https://take.ms/5qSfd ) All these div content is not under the "mm-page mm-slideout" div which injected from mmenu.js
noSelector:["#zen-wrap", ".zen-fixed", ".sb-slidebar"]
Or is there any important element that needs to exclude as well? 
