I just received emails from Google this morning after they tested several of my sites that have the amp-wp plugin installed. Below are the errors that were received for pretty much all the AMP pages on my sites. So the wp-amp plugin must not be setting things up correctly.

• Error in schema.org NewsArticle
• Invalid attribute value (type=text/javascript, allowfullscreen=allowfullscreen, etc.)
• Prohibited tag (img)
• Stylesheet CDATA attribute missing or invalid (Disallowed @import in CSS)
• Incorrectly nested tag (body > script)

I also received this error on a few pages on all my sites as well

• Required attribute missing (height)