Fatal error: Uncaught Error: Class 'WP_Block_Metadata_Registry' not found in /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/blocks.php:391 Stack trace: #0 /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/blocks/index.php(174): wp_register_block_metadata_collection('/export/sd08/ww...', '/export/sd08/ww...') #1 /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/class-wp-hook.php(324): wp_register_core_block_metadata_collection('') #2 /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/plugin.php(517): WP_Hook->do_action(Arr in /export/sd08/www/jp/r/e/gmoserver/3/1/sd0116631/zoom.popmedia.jp/wordpress-5.8.0-ja-jetpack_webfont-undernavicontrol/wp-includes/blocks.php on line 391