Title: Errors when editing posts
Last modified: July 9, 2019

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# Errors when editing posts

 *  Resolved [mikehermary](https://wordpress.org/support/users/mikehermary/)
 * (@mikehermary)
 * [6 years, 11 months ago](https://wordpress.org/support/topic/errors-when-editing-posts/)
 * Hello,
 * I recently updated to WPSSO Core Version 5.1.0. After updating, the following
   error message was displayed when trying to edit posts: **The site is experiencing
   technical difficulties. Please check your site admin email inbox for instructions**.
   I have reviewed my server’s PHP error logs and the following is logged when I
   try editing a post.
 *     ```
       PHP Fatal error:  Uncaught Error: Call to undefined function mb_convert_encoding() in /home/path/to/wordpress/wp-content/plugins/wpsso/lib/util.php:1892
       Stack trace:
       #0 /home/path/to/wordpress/wp-content/plugins/wpsso/lib/post.php(1123): WpssoUtil->get_html_head_meta(false, '/html/head/link...', true)
       #1 /home/path/to/wordpress/wp-content/plugins/wpsso/lib/post.php(767): WpssoPost->check_post_head_duplicates(166863, Object(WP_Post))
       #2 /home/path/to/wordpress/wp-includes/class-wp-hook.php(286): WpssoPost->load_meta_page(Object(WP_Screen))
       #3 /home/path/to/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(Object(WP_Screen), Array)
       #4 /home/path/to/wordpress/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
       #5 /home/path/to/wordpress/wp-admin/includes/class-wp-screen.php(411): do_action('current_screen', Object(WP_Screen))
       #6 /home/path/to/wordpress/wp-admin/includes/screen.php(241): WP_Screen->set_current_screen()
       #7 /home/path/to/wordpress/wp-admin/admin.php( in /home/path/to/wordpress/wp-content/plugins/wpsso/lib/util.php on line 1892
       ```
   
 * Once I disable the plugin, I can edit posts with no issues.
 * The server is running WordPress 5.2.2, PHP 7.2.19, and MariaDB 5.5.5-10.3.16.
 * Cheers,
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferrors-when-editing-posts%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [JS Morisset](https://wordpress.org/support/users/jsmoriss/)
 * (@jsmoriss)
 * [6 years, 11 months ago](https://wordpress.org/support/topic/errors-when-editing-posts/#post-11712739)
 * See the SSO toolbar notifications – you’re missing the PHP mbstring extension,
   or the extension is incomplete (see [https://secure.php.net/manual/en/book.mbstring.php](https://secure.php.net/manual/en/book.mbstring.php))
   and WPSSO is almost certainly showing an error for this in the SSO toolbar notification
   area.
 * Contact your hosting provider and ask them to install the PHP mbstring extension,
   or if it’s already installed, then they need to fix it.
 * js.
 *  Thread Starter [mikehermary](https://wordpress.org/support/users/mikehermary/)
 * (@mikehermary)
 * [6 years, 11 months ago](https://wordpress.org/support/topic/errors-when-editing-posts/#post-11714623)
 * Hello,
 * We have installed the mbstring extension and the problem has been resolved.
 * Cheers,

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Errors when editing posts’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [mikehermary](https://wordpress.org/support/users/mikehermary/)
 * Last activity: [6 years, 11 months ago](https://wordpress.org/support/topic/errors-when-editing-posts/#post-11714623)
 * Status: resolved