Title: Seious Error
Last modified: December 10, 2024

---

# Seious Error

 *  Resolved [hs](https://wordpress.org/support/users/haradhansharma/)
 * (@haradhansharma)
 * [1 year, 5 months ago](https://wordpress.org/support/topic/seious-error/)
 *     ```wp-block-code
       Fatal error: Uncaught Error: Call to undefined function Sabre\Xml\Serializer\standardSerializer()in /home/user/public_html/wp-content/plugins/wpsso-google-merchant-feed/vendor/sabre/xml/lib/Writer.php on line 99Call stack:Sabre\Xml\Writer::write()wp-content/plugins/wpsso-google-merchant-feed/vendor/sabre/xml/lib/Writer.php:188Sabre\Xml\Writer::writeElement()wp-content/plugins/wpsso-google-merchant-feed/vendor/sabre/xml/lib/Service.php:228Sabre\Xml\Service::write()wp-content/plugins/wpsso-google-merchant-feed/vendor/vitalybaev/google-merchant-feed/src/Feed.php:143Vitalybaev\GoogleMerchant\Feed::build_atom()wp-content/plugins/wpsso-google-merchant-feed/vendor/vitalybaev/google-merchant-feed/src/Feed.php:103Vitalybaev\GoogleMerchant\Feed::build()wp-content/plugins/wpsso-commerce-manager-catalog-feed/lib/xml.php:251WpssoCmcfXml::get()wp-content/plugins/wpsso-commerce-manager-catalog-feed/lib/submenu/facebook-catalog.php:116WpssoCmcfSubmenuFacebookCatalog::get_table_rows()wp-content/plugins/wpsso/lib/admin.php:1593WpssoAdmin::show_metabox_table()wp-admin/includes/template.php:1456do_meta_boxes()wp-content/plugins/wpsso/lib/admin.php:1427WpssoAdmin::show_post_body_settings_form()wp-content/plugins/wpsso/lib/admin.php:1275WpssoAdmin::show_settings_page()wp-includes/class-wp-hook.php:324WP_Hook::apply_filters()wp-includes/class-wp-hook.php:348WP_Hook::do_action()wp-includes/plugin.php:517do_action()wp-admin/admin.php:259
       ```
   

Viewing 1 replies (of 1 total)

 *  Plugin Author [JS Morisset](https://wordpress.org/support/users/jsmoriss/)
 * (@jsmoriss)
 * [1 year, 5 months ago](https://wordpress.org/support/topic/seious-error/#post-18193320)
 * The standardSerializer() function is provided with the WPSSO CMCF plugin:
 * wpsso-commerce-manager-catalog-feed/vendor/sabre/xml/lib/Serializer/functions.
   php:function standardSerializer(Writer $writer, $value): void
   wpsso-commerce-
   manager-catalog-feed/vendor/sabre/xml/lib/Serializer/functions.php: standardSerializer(
   $writer, $item);wpsso-commerce-manager-catalog-feed/vendor/sabre/xml/lib/Writer.
   php: Serializer\standardSerializer($this, $value);
 * Perhaps your site is loading an older version of sabre\xml from somewhere which
   does not include that function. I’ve just released WPSSO CMCF v4.11.0 which requires
   sabre\xml v4.0.6 or better. Hopefully that will fix your issue on your site.
 * js.

Viewing 1 replies (of 1 total)

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

 * ![](https://ps.w.org/wpsso-commerce-manager-catalog-feed/assets/icon-256x256.
   png?rev=3167709)
 * [WPSSO Commerce Manager Catalog Feed XML](https://wordpress.org/plugins/wpsso-commerce-manager-catalog-feed/)
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 * 1 reply
 * 2 participants
 * Last reply from: [JS Morisset](https://wordpress.org/support/users/jsmoriss/)
 * Last activity: [1 year, 5 months ago](https://wordpress.org/support/topic/seious-error/#post-18193320)
 * Status: resolved