Title: Error while using Yoast
Last modified: December 11, 2023

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# Error while using Yoast

 *  Resolved [grahamg](https://wordpress.org/support/users/grahamg/)
 * (@grahamg)
 * [2 years, 6 months ago](https://wordpress.org/support/topic/error-while-using-yoast/)
 * I get this string on the website:
 * **Warning**: Attempt to read property “post_type” on null in **/home/lcdtvenc/
   public_html/blog/wp-content/plugins/schema/includes/extensions/breadcrumbs.php**
   on line **189**
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-while-using-yoast%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Support [Maybellyne](https://wordpress.org/support/users/maybellyne/)
 * (@maybellyne)
 * [2 years, 5 months ago](https://wordpress.org/support/topic/error-while-using-yoast/#post-17270913)
 * Hello [@grahamg](https://wordpress.org/support/users/grahamg/),
 * Thanks for using the Yoast SEO plugin, but the error isn’t from our plugin. You
   have another plugin on your site called `schema` that adds structured data to
   your website. You can see that in the file path mentioned in the error: /blog/
   wp-content/**plugins/schema/**includes/.
 * Please reach out to the plugin developer for further assistance.

Viewing 1 replies (of 1 total)

The topic ‘Error while using Yoast’ is closed to new replies.

 * ![](https://ps.w.org/wordpress-seo/assets/icon-256x256.gif?rev=3419908)
 * [Yoast SEO - Advanced SEO with real-time guidance and built-in AI](https://wordpress.org/plugins/wordpress-seo/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-seo/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wordpress-seo/)
 * [Active Topics](https://wordpress.org/support/plugin/wordpress-seo/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-seo/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wordpress-seo/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [Maybellyne](https://wordpress.org/support/users/maybellyne/)
 * Last activity: [2 years, 5 months ago](https://wordpress.org/support/topic/error-while-using-yoast/#post-17270913)
 * Status: resolved