Fatal error: Uncaught Error: Class 'WP_Block_Metadata_Registry' not found in /wp-includes/blocks.php:417
Stack trace:
#0 /wp-includes/blocks/index.php(174): wp_register_block_metadata_collection('//wp-includes/b...', '//wp-includes/b...')
#1 /wp-includes/class-wp-hook.php(324): wp_register_core_block_metadata_collection('')
#2 /wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#3 /wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /wp-settings.php(700): do_action('init')
#5 /wp-config.php(96): require_once('/wp-settings.ph...')
#6 /wp-load.php(50): require_once('/wp-config.php')
#7 /wp-blog-header.php(13): require_once('/wp-load.php')
#8 /index.php(17): require('/wp-blog-header...')
#9 {main}
thrown in /wp-includes/blocks.php on line 417