Fatal error: Uncaught Error: Call to undefined function register_widget() in /usr/www/users/adornamjuw/wp-includes/widgets.php:1618
Stack trace:
#0 /usr/www/users/adornamjuw/wp-includes/class-wp-hook.php(286): wp_widgets_init('')
#1 /usr/www/users/adornamjuw/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#2 /usr/www/users/adornamjuw/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#3 /usr/www/users/adornamjuw/wp-settings.php(467): do_action('init')
#4 /usr/www/users/adornamjuw/wp-config.php(51): require_once('/usr/www/users/...')
#5 /usr/www/users/adornamjuw/wp-load.php(40): require_once('/usr/www/users/...')
#6 /usr/www/users/adornamjuw/wp-blog-header.php(15): require_once('/usr/www/users/...')
#7 /usr/www/users/adornamjuw/index.php(5): require('/usr/www/users/...')
#8 {main}
  thrown in /usr/www/users/adornamjuw/wp-includes/widgets.php on line 1618