Title: PHP Error: Undefined property WP_Screen::$is_block_editor
Last modified: February 1, 2019

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# PHP Error: Undefined property WP_Screen::$is_block_editor

 *  [charafweb](https://wordpress.org/support/users/charafweb/)
 * (@charafweb)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/php-error-undefined-property-wp_screenis_block_editor/)
 * Hi dev,
    I’m getting this php error in the classic editor (reported by Query 
   Monitor Since previous version, I’m now on Version 3.3.7): Notice Undefined property:
   WP_Screen::$is_block_editor 1 wp-content/plugins/wp-seopress/inc/admin/admin-
   metaboxes.php:399 Plugin: wp-seopress
 * Wordpress version 4.9.9
 * Thanks

The topic ‘PHP Error: Undefined property WP_Screen::$is_block_editor’ is closed 
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 * 0 replies
 * 1 participant
 * Last reply from: [charafweb](https://wordpress.org/support/users/charafweb/)
 * Last activity: [7 years, 4 months ago](https://wordpress.org/support/topic/php-error-undefined-property-wp_screenis_block_editor/)
 * Status: not resolved