Fatal error: Uncaught Error: Call to undefined function register_block_type() in /homepages/38/d558609185/htdocs/2017/wp-content/plugins/uji-countdown/src/blocks.php:65 Stack trace: #0 /homepages/38/d558609185/htdocs/2017/wp-includes/class-wp-hook.php(286): uji_countdown_2020_uji_block_assets('') #1 /homepages/38/d558609185/htdocs/2017/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(Object(RegenerateThumbnails), Array) #2 /homepages/38/d558609185/htdocs/2017/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /homepages/38/d558609185/htdocs/2017/wp-settings.php(450): do_action('init') #4 /homepages/38/d558609185/htdocs/2017/wp-config.php(81): require_once('/homepages/38/d...') #5 /homepages/38/d558609185/htdocs/2017/wp-load.php(37): require_once('/homepages/38/d...') #6 /homepages/38/d558609185/htdocs/2017/wp-blog-header.php(13): require_once('/homepages/38/d...') #7 /homepages/38/d558609185/htdocs/2017/index.php(17): require('/homepages/38/d...') #8 {main} thrown in /homepages/38/d558609185/htdocs/2017/wp-content/plugins/uji-countdown/src/blocks.php on line 65