You need to add this meta tag inside the head tag.
Most people get this error because they don’t add this inside head tag.
So, guys, you can watch the video linked below :
The fb:pages tag on the url doesn’t contain this page’s id. The url has fb:pages tag but they don’t have this page’s id. Please work with your developers / webmaster to add this tag to your website
Goodluck if you have any query feel free to comment below