Let me know if this fixes the issue for you. In vbbridge.php, find this line in the function get_userdata():
PHP Code:
if ( !$user_a = $vb->db->query_first("SELECT * FROM " . TABLE_PREFIX . "user WHERE userid = '" . intval($user_id) . "'") )
return false;
Add this right AFTER that:
PHP Code:
$user = new WP_User;