Fatal error: Uncaught Error: Call to undefined function register_block_type() in /htdocs/wp-content/plugins/ninja-forms/blocks/bootstrap.php:21
Stack trace:
#0 /htdocs/wp-includes/class-wp-hook.php(286): Ninja_Forms::{closure}('')
#1 /htdocs/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(true, Array)
#2 /htdocs/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#3 /htdocs/wp-settings.php(450): do_action('init')
#4 /htdocs/wp-config.php(90): require_once('/htdocs/wp-sett...')
#5 /htdocs/wp-load.php(37): require_once('/htdocs/wp-conf...')
#6 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...')
#7 /htdocs/index.php(17): require('/htdocs/wp-blog...')
#8 {main}
thrown in /htdocs/wp-content/plugins/ninja-forms/blocks/bootstrap.php on line 21