public function error()
    {
        if ($this->error) {
            $debug_tpl_vars = [
                '{LANGUAGE}' => $this->language,
                '{PATH}'     => self::LANG_ROOT,
            ];
            $msg = strtr($this->error_messages[$this->error], $debug_tpl_vars);

            return "<br /><strong>GenSynth Error:</strong> $msg (code {$this->error})<br />";
        }

        return false;
    }