Title: Error code
Last modified: September 1, 2016

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# Error code

 *  Resolved [bigpaulg](https://wordpress.org/support/users/bigpaulg/)
 * (@bigpaulg)
 * [9 years, 9 months ago](https://wordpress.org/support/topic/error-code-56/)
 * I received this message when I tried to generate the sitemap.
    What does it mean?
   How do I fix this so I cn generate the sitemap?
 * A cURL error occurred with the error message:
    SSL: certificate subject name ‘
   marcobeierer.de’ does not match target host name ‘api.marcobeierer.com’.
 * [https://wordpress.org/plugins/mb-sitemap-generator/](https://wordpress.org/plugins/mb-sitemap-generator/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Marco Beierer](https://wordpress.org/support/users/mbsec/)
 * (@mbsec)
 * [9 years, 9 months ago](https://wordpress.org/support/topic/error-code-56/#post-7672159)
 * Hi Paul,
 * Thank you for trying the Sitemap Generator.
 * This issue is most probably caused by an outdated cURL or OpenSSL version. Both
   libraries need to support [SNI](https://en.wikipedia.org/wiki/Server_Name_Indication).
   cURL supports SNI from version 7.18.1 (published 2008) and OpenSSL from version
   0.9.8f (published 2007) or later.
 * If you are using PHP 5.3 or earlier, the issue could most probably be fixed by
   upgrading to a more recent PHP version. But be aware that this could have side
   effects if a plugin is not compatible with newer PHP versions. However plugins
   that are still maintained should be compatible with current PHP versions.
 * If you are using an up to date PHP version, it could be that PHP is compiled 
   against outdated versions of cURL or OpenSSL. In this case, may you check which
   versions of these libraries you are using? You may could do this in your hosters
   control panel. If not, [phpinfo()](https://codex.wordpress.org/Finding_Server_Info)
   would output the versions. Let me know if you need help with this. Normally such
   old versions of these libraries are not used on purpose and the hoster would 
   fix this, if he knows about it.
 * Best regards,
    Marco

Viewing 1 replies (of 1 total)

The topic ‘Error code’ is closed to new replies.

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## Tags

 * [curl error](https://wordpress.org/support/topic-tag/curl-error/)

 * 1 reply
 * 2 participants
 * Last reply from: [Marco Beierer](https://wordpress.org/support/users/mbsec/)
 * Last activity: [9 years, 9 months ago](https://wordpress.org/support/topic/error-code-56/#post-7672159)
 * Status: resolved