There are many reasons why PHP might not be able to write to a data directory, from open basedir restrictions to SELinux. The folder permissions are often just a small part of the puzzle.

Unfortunately these reasons are server specific. I suggest that you ask your hosting provider:

"What do I do to allow PHP to write to this directory?"

Good hosting providers will help as the question is not actually application specific.

Thank you for the reply

I was successful install  :)