Getting this JQEURY error.

I was dealing with a problem and thought imay be fancybox with FCHAT, but after unseletcting my java cache and compression now I see the actual error.  This happens when jsut clicking the next button on the member block o nthe homepage. It will shrink and when inspecting I get this error. Also on pages that get to much content this same thing will happen and the bottom bar will vanish. This happens on the blog page and accoutn page if blog posting is listed. 

/plugins/jquery/jquery.js:4 Uncaught TypeError: Cannot read property 'matches' of undefined

    at eval (eval at <anonymous> (/plugins/jquery/jquery.js:2), <anonymous>:9:8253)

    at eval (eval at <anonymous> (/plugins/jquery/jquery.js:2), <anonymous>:9:8434)

    at eval (eval at <anonymous> (/plugins/jquery/jquery.js:2), <anonymous>:9:8682)

    at eval (<anonymous>)

    at /plugins/jquery/jquery.js:2

    at Function.globalEval (/plugins/jquery/jquery.js:2)

    at text script (/plugins/jquery/jquery.js:4)

    at Wb (/plugins/jquery/jquery.js:4)

    at y (/plugins/jquery/jquery.js:4)

    at c (/plugins/jquery/jquery.js:4)

https://gyazo.com/9979d0ba0318427625a92ff5e7b53525 (This is when you use the next button in a box)

https://gyazo.com/d25dd231d724cc04658f60e7c67d4a1b (This is the error and box missing on blogs page, only on some peoples I might add.) (Also only on some profile pages)

I dont know much about Java :/

In my limited experience this is usually because two elements on a page are both calling for the same or conflicting script. Here's an example of one that gave me some trouble on the home page. It was from a js countdown timer (third party not from boonex or boonex developers) and it was conflicting with the js that was being used by another product we we using.

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>

Again, that's just my own experiences. Someone more knowledgeable feel free to interject.

After research I found the blog plugin was the problem. It seems it may have been bc I made the accoutn before the upgrade which is even stranger.