警告:MPDF 库不存在

Warning : MPDF library does not exist

我已经下载了更新版的 Mpdf 并与 open-cart 一起使用。它给我以下警告:

Warning : MPDF library does not exist, please download and upload. For upload MPDF library

如何解决这个警告?我不认为我可以在我的实时网站上安装作曲家。我在 system > library > mpdf 目录中上传了 MPDF 库,但问题仍然存在。检查以下代码:

    if(!is_file(DIR_SYSTEM . 'library/mpdf/vendor/autoload.php')){
             $this->log->write('Warning : MPDF library does not exist, please download and upload it. for upload MPDF library https://github.com/mpdf/mpdf');
             echo 'Warning : MPDF library does not exist, please download and upload. For upload MPDF library <a target="_blank" href="https://github.com/mpdf/mpdf">Click here</a>';
             exit;
    }

   error_reporting(0);

   require_once(DIR_SYSTEM.'library/mpdf/vendor/autoload.php');

请在system librabry目录下设置mpdf库