You will get this error if you are using Apache2 or Nginx web servers. You can use Apache as web server and enable suPHP from Apache settings and you shall not face this issue.
If you wish to use Apache2 or Nginx as web servers you can add FTP details in your wp-config.php file, to resolve the issue. You can refer to the below guide for the same:
https://digwp.com/2010/11/ftp-in-wpconfig/
Thanks for response, this problems fix after i am input my detail host and ftp to wp-config.php but did anyway to do this with one command, i have total about 200 subdomain in one machine and of course it need lot time.