A couple of website problems....one with Pinterest plugin

I have a problem with Pin It (pinterest), I installed this when I first started my website and just recently it started to only render 1/2 of the box in the bottom right widget area, instead of the whole area. Here is the code in the widget:

<script type="text/javascript" async src="//assets.pinterest.com/js/pinit.js"></script>

Any suggestions how I might fix this?....does not even show up as a plug in.

Thanks,
David