Facebook has recently made some changes lately regarding Comments and Like/Share buttons for Europe. If users are not authenticated on the site with Facebook credentials, the social plugins will not render. In addition, the user must consent to Cookies for the comments to work properly.
You can read more details regarding the changes
here
.
We are based in the US. Going to your site, I am able to see the like buttons and comment widget on your site in Chrome on a Mac just fine.
-Melissa
Facebook comments does show on some computers/tablets
