Fresh install mkdir (); error

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I have a LEMP stack on a VPS running centOS 7.2. This is all freshly installed for running a Concrete5 site.
My php-fpm/www.conf file has listen.user/listen.group=nginx as well as user/group=nginx.
the whole site directory is owned by nginx:nginx.
I have tried the installation with everything short of 777 permissions. I tried 775 and 755 which should work with the folders and files having the same owner as the server uses if I understand things correctly.

My install is loosely based off the following guide:
http://linoxide.com/linux-how-to/install-concrete5-cms-ubuntu-15-04...

The package names are not 100% correct for centOS but I found and used the correct ones. Any ideas would be most appreciated or even a pointer to a different guide I could try.

I'm not totally new to Linux but I don't setup servers enough to remember everything so I might be missing something simple.

Thank you for any help

 
MonkadelicD replied on at Permalink Reply
Anyone? This is frustrating. I've had concrete5 running on my shared hosting provider, 1&1, but I'd like to get it running on my VPS.