Social sharing blocked

Hey guys,

Hope you're doing well. Quick question - our featured images don't show anymore on FB or Pinterest for our site http://www.mytartare.com. We had a developer install JCH Optimize, Wp Fastest cache and do some other work a while ago (about the time this started happening actually) and now sharing the links or even using any social plugin doesn't populate on either social network. Any ideas? Just thought I'd ask you experts. thanks, Derek