Let you check in header.php, make sure there is wp_head in header.php
But I’m also having problem with OG code, I need some line to be inserted in OG by using custom field, in my case:
<meta property=”og:video” content=”https://www.vimeo.com” />
and I’m inserting og:video in custom field with the vimeo’s video url then how to call the video custom field in wordpress-seo/frontend/class-opengraph.php?
