Fatal error: Uncaught Error: Class 'WP_Block_Metadata_Registry' not found in /var/www/html/wp-includes/blocks.php:428 Stack trace: #0 /var/www/html/wp-includes/blocks/legacy-widget.php(68): register_block_type_from_metadata('/var/www/html/w...', Array) #1 /var/www/html/wp-includes/class-wp-hook.php(324): register_block_core_legacy_widget('') #2 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /var/www/html/wp-settings.php(700): do_action('init') #5 /var/www/html/wp-config.php(98): require_once('/var/www/html/w...') #6 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...') #7 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...') #8 /var/www/html/index.php(17): require('/var/www/html/w...') #9 {main} thrown in /var/www/html/wp-includes/blocks.php on line 428