Issue Move uploaded file not working online server in php

[PaidClass_Owner]

in the XAMPP localhost i am able to upload images
But windows hositng-plesk online server i am not able upload images/Photos
Error is
Warning: move_uploaded_file(img/vp12.jpeg): Failed to open stream: Permission denied in G:\PleskVhosts\paidclass.com\sairamweb\My_Profile.php on line 121

Warning: move_uploaded_file(): Unable to move "C:\Windows\Temp\phpD1A.tmp" to "img/vp12.jpeg" in G:\PleskVhosts\paidclass.com\sairamweb\My_Profile.php on line 121
File Not Moved because

Please help me !