issue using a downlader and response.

[shubhankar-mern]

 res.download(zipPath, (error) => {
          if (error) {
            console.error('Error generating screenshot:', error);
            req.flash('message', 'Failed to generate screenshot');
            res.redirect('/');
          } else {
            console.log('zip download', zipPath);
            // Delete the zip file after it has been sent
            deletezip(zipPath, () => {
              req.flash('message', 'Success generated screenshot');
              res.redirect('/');
            });
          }

....ideally after deletezip..req,flash and redirect should work..but its not working?