Sorry for a long reply, the support for free plugins is not in our priority. The latest plugin version should by default adapt to the width of its parent container on page load.
If you still want to use this plugin please post a URL link to the demo, so we can check the issue.
If you could let me know the issue I will be thankful.
You have this custom CSS added to the page:
Making container absolutely positioned you take it from the page flow and make it no width, so Facebook use a “0” as a container width value.
We understand why you have added this code to align your flex layout and make it even height with the left column, but you should look for another CSS hack in this case.