SocialLabor on "Error Msg on /amp page version"

Fatal error: Call to undefined function attachment_url_to_postid() in /home/content/46/7608346/html/lfblog/wp-content/plugins/amp/includes/utils/class-amp-image-dimension-extractor.php on line 62

https://wordpress.org/plugins/amp/

AMP plugin does not support 'pages' only 'posts' -- at this time.

If I misunderstood your error, apologies.