Error while creating image

This error appears when the cron "tidy search" is loaded

Error while creating image
» Error in [ROOT]/phpbb/search/fulltext_native.php on line 107: Missing argument 8 for phpbb/search/fulltext_native::__construct(), called in [ROOT]/phpbb/cron/task/core/tidy_search.php on line 61 and defined

Line 61 of tidy_search.php is this:
$search = new $search_type($error, $this->phpbb_root_path, $this->php_ext, $this->auth, $this->config, $this->db, $this->user);

Line 107 of fulltext_native.php is this:
public function __construct(&$error, $phpbb_root_path, $phpEx, $auth, $config, $db, $user, $phpbb_dispatcher)

Necessary to include the parameter "$phpbb_dispatcher"