Fatal error: Uncaught Error: Class "WP_Widget_Block" not found in /wp-includes/class-wp-widget-factory.php:61 Stack trace: #0 /wp-includes/widgets.php(115): WP_Widget_Factory->register('WP_Widget_Block') #1 /wp-includes/widgets.php(1847): register_widget('WP_Widget_Block') #2 /wp-includes/class-wp-hook.php(307): wp_widgets_init('') #3 /wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #4 /wp-includes/plugin.php(474): WP_Hook->do_action(Array) #5 /wp-settings.php(587): do_action('init') #6 /wp-config.php(101): require_once('/wp-settings.ph...') #7 /wp-load.php(50): require_once('/wp-config.php') #8 /wp-blog-header.php(13): require_once('/wp-load.php') #9 /index.php(17): require('/wp-blog-header...') #10 {main} thrown in /wp-includes/class-wp-widget-factory.php on line 61