Sadly broken under WordPress 4.0

Sadly broken under WordPress 4.0 with Genesis.

pages on which you put the shortcode, have this appearing on top of them.

Warning: Illegal string offset ‘list_only’ in /home/airfr513/public_html/hotairfrying.com/wp-content/plugins/summary-child-pages/summary-child-pages.php on line 76

Warning: Illegal string offset ‘id’ in /home/airfr513/public_html/hotairfrying.com/wp-content/plugins/summary-child-pages/summary-child-pages.php on line 83