I'm assuming you probably haven't updated Question2Answer for a while now. That is a problem that was fixed a few versions ago. Both for Q2A, and also Legacy theme.
Download Q2A version 1.8.6 - latest versions
I've noticed that something on your website is removing the itemscope tags from the .qa-body-wrapper" .
This could be by moving or cloning this element trough JS, or rewriting it through PHP. So these tags are not being printed again in the DOM.
I've created a new external wrapper element, so whatever function that's pointing to the .qa-body-wrapper element won't be removing them anymore.
Check your email for update.