Fatal error: Uncaught Error: Call to a member function query() on null in /www/wp-content/plugins/gutenberg/lib/client-assets.php:58 Stack trace: #0 /www/wp-content/plugins/gutenberg/lib/client-assets.php(191): gutenberg_override_script('wp-a11y', 'http://roberthu...', Array, 1552425872, true) #1 /www/wp-content/plugins/gutenberg/lib/client-assets.php(206): gutenberg_register_packages_scripts() #2 /www/wp-includes/class-wp-hook.php(286): gutenberg_register_scripts_and_styles('') #3 /www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array) #4 /www/wp-includes/plugin.php(465): WP_Hook->do_action(Array) #5 /www/wp-includes/script-loader.php(2463): do_action('wp_enqueue_scri...') #6 /www/wp-includes/class-wp-customize-manager.php(455): wp_enqueue_scripts() #7 /www/wp-includes/class-wp-customize-manager.php(552): WP_Customize_Manager->wp_die(0, 'Non-existent ch...') #8 /www/wp-includes/class-wp-hook.php(286): WP_Customize_Manager->setup_theme('') #9 /www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filte in /www/wp-content/plugins/gutenberg/lib/client-assets.php on line 58