Support » Plugin: NextScripts: Social Networks Auto-Poster » Error when authorizing Facebook "Invalid or no certificate authority found"

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  • Plugin Author NextScripts


    This error means that cURL is misconfigured on your server. Most probably curl ssl(open SSL) is broken or it simply can’t find the certificates at the pointed location. Please contact your hosting provider and ask them to fix this.

    Unlike Twitter or Google+ that could be automatically switched to non-SSL connections in such cases, Facebook requires to be accessed by SSL at all times.

    Please let me know if you have any questions.

    Ludwig Van Normainen

    Hi Ludwig,

    We have a dedicated Windows server using IIS7. I’ve just checked, and cURL is enabled in PHP.

    Might it be that we need to create a self-signed certificate in IIS for the domain we’re using?


    Plugin Author NextScripts


    This is not about server side certificates that you can install. This is about client side certificates that cURL is using to access HTTPS websites. Those are the same certificates that any browser uses. You need to have them on your server and cURL should be configured with the location of such certificates.


    I’ve checked the server config and everything seems fine. However I’ve seen a few other posts on the internet where users have fixed the issue by editing the following lines in “base_facebook.php”:

    public static $CURL_OPTS = array(
    CURLOPT_USERAGENT => ‘facebook-php-3.2’,

    I’ve tested it and this now works, and the plugin successfully posts to the Facebook page.

    Is this something you can fix in a future update so I don’t have to edit the files?


    Plugin Author NextScripts


    Officially Facebook requires CURLOPT_SSL_VERIFYPEER to be set to true.

    Ok, well in the long-term I guess this needs a solution, but the plugin has been working fine for the last few weeks, so currently all is well.

    Will keep any eye out for any future conflicts.

Viewing 6 replies - 1 through 6 (of 6 total)
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