Anyone know about the FB App ID?

Hi,

Whenever I run a new article url in the FB Debugger I see this warning which is probably not a big problem but prefer not seeing any warning signs.

Any tips where to find the App ID (Instant Articles) and where to include it in our website/article?

Thanks,
Mark.

You can find App ID in Developer account, where are you all apps, and add it on website header
<M property="fb:app_id" content="ХХХХХХХХХХХХХХХ" />

Great, thank you so much. It worked!!!