• Resolved mikehermary



    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.


    The page I need help with: [log in to see the link]

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  • Plugin Author JS Morisset


    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) 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.



    We have installed the mbstring extension and the problem has been resolved.


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