Fatal error: Uncaught Error: Call to undefined function register_block_type() in /wp-content/plugins/ninja-forms/blocks/bootstrap.php:21
Stack trace:
#0 /wp-includes/plugin.php(524): Ninja_Forms::{closure}('')
#1 /wp-settings.php(411): do_action('init')
#2 /wp-config.php(77): require_once('/wp-settings.ph...')
#3 /wp-load.php(39): require_once('/wp-config.php')
#4 /wp-blog-header.php(13): require_once('/wp-load.php')
#5 /index.php(17): require('/wp-blog-header...')
#6 {main}
thrown in /wp-content/plugins/ninja-forms/blocks/bootstrap.php on line 21