[Open Graph and Twitter Card Tags] Error handling [WordPress plugin]

Error

Error: Facebook Open Graph Tags cache NOT updated/purged.
Facebook returned: (#100) Must have a valid access token or a valid url_hmac
…

Cause of the error

The cause of the error is not due to the plug-in update, but is due to a change in the specifications on Facebook.

Facebook stopped accepting non-authenticated calls to the clear cache URL.

How to deal

The developer explains how to deal with it in the support forum.

Create Facebook app ID

Create a Facebook App ID on the Facebook for Developer page below. If you have already created, the created app ID will be displayed on the following page.

https://developers.facebook.com/apps/

Copy app ID and app secret

Make a copy of “App ID” and “app secret”. Each item can be confirmed by “Dashboard”-> “Settings”-> “Basic”.

Edit functions.php

Add the code to “functions.php” in the theme file.

“functions.php”

//Open Graph and Twitter Card Tags
add_filter( 'fb_og_update_cache_url', 'my_fb_og_update_cache_url' );
function my_fb_og_update_cache_url( $url ) {
$url .= '&access_token=[app ID]|[app secret]';
return $url;
}

Reference site

• Open Graph and Twitter Card Tags » Hi i got this trouble when updating to 2.1.4
• Facebook Open Graph, Google+ and Twitter Card Tags with Access Token · GitHub

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