Continued from previous post:
Duplicate Open Graph Meta Tags and the Facebook Open Graph Object Debugger
Another warning that may be revealed by the Facebook Open Graph Object Debugger is the ‘Share App ID Missing’ warning.
To resolve this error you need to specify a Facebook app ID for your site. See the following Facebook guide to register and app and get the ID:
1st, login to your Facebook account and then register as a Facebook Developer.
Next, Create App ID.
Next, do the security CAPTCHA, and voila! You should have your ID now.
Then, go to Yoast in your WordPress Admin page.
Insert your ID and Save changes.
Back at your Facebook Developer Dashboard, select App Review on the left menu bar.
Set the Slider from No to ‘Yes’, add a category as shown and ‘Confirm’.
Rescrape the site and you should see the warning gone.
Be sure to see the next post in this series:
More control sharing your WordPress site with Yoast SEO plugin