bbPress.org

Checking my website access logs and there are a lot of internal server errors referencing:

PHP Warning: in_array() expects parameter 2 to be array, null given in /home/munson/public_html/musiclibraryreport.com/wp-content/plugins/bbpress/includes/common/functions.php on line 1155

Line 1155: `if ( in_array( ‘post_parent__in’, $wp->private_query_vars ) )
return $where;
`

Using 2.2.4 version. Website is http://www.musiclibraryreport.com. Any insight is appreciated.

Thank you