When Jetpack Publicize publishes a post to your Facebook profile or Page, Facebook crawls your post and looks for Open Graph meta tags in the head to build a complete post preview (with an image, title, description, ...).
If it detects an error in these Open Graph meta tags, Facebook rejects the Publicized post.
You can see what Facebook sees and check for errors by entering one of your posts' URLs in Facebook Debugger:
If the debugger reports an error, you'll need to fix it for Publicize to start working again.
- A common error is a duplicate set of Open Graph meta tags. In such cases, the solution would be to make sure you only use one plugin to manage Open Graph tags.
- Another error can be a wrong Facebook Admin ID. In such cases, start by looking for your current admin ID here, and then update your Open Graph plugin to use the correct value.
- Some themes also manage Open Graph meta tags for you. If that's the case, you'll need to edit the theme or contact the theme authors to ask them how to remove Open Graph meta data from your theme.