Fatal error: Uncaught Error: Call to undefined function register_block_type() in /usr/www/users/printvwzvm/wp-content/plugins/leadin/inc/leadin-gutenberg.php:11 Stack trace: #0 /usr/www/users/printvwzvm/wp-includes/class-wp-hook.php(298): leadin_register_gutenberg_block('') #1 /usr/www/users/printvwzvm/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /usr/www/users/printvwzvm/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /usr/www/users/printvwzvm/wp-settings.php(448): do_action('init') #4 /usr/www/users/printvwzvm/wp-config.php(89): require_once('/usr/www/users/...') #5 /usr/www/users/printvwzvm/wp-load.php(37): require_once('/usr/www/users/...') #6 /usr/www/users/printvwzvm/wp-blog-header.php(13): require_once('/usr/www/users/...') #7 /usr/www/users/printvwzvm/index.php(17): require('/usr/www/users/...') #8 {main} thrown in /usr/www/users/printvwzvm/wp-content/plugins/leadin/inc/leadin-gutenberg.php on line 11