Fatal error: Uncaught Error: Class "WP_Block_Metadata_Registry" not found in /htdocs/wp-includes/blocks.php:428 Stack trace: #0 /htdocs/wp-includes/blocks/legacy-widget.php(68): register_block_type_from_metadata('/htdocs/wp-incl...', Array) #1 /htdocs/wp-includes/class-wp-hook.php(324): register_block_core_legacy_widget('') #2 /htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /htdocs/wp-settings.php(700): do_action('init') #5 /htdocs/wp-config.php(90): require_once('/htdocs/wp-sett...') #6 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...') #7 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...') #8 /htdocs/index.php(17): require('/htdocs/wp-blog...') #9 {main} thrown in /htdocs/wp-includes/blocks.php on line 428