NGINX CI4 error

It's an permission problem for sure. CentOS uses SELinux per default, and that stops everything if you don't allow it first. So that's probably it.

I have just disabled it (not really recommended) every time i got a CentOS machine. Now I just use Ubuntu servers instead, way easier to set up, they have that www-data group, that's why I mentioned it.

Try to temporary disable it:
https://linuxize.com/post/how-to-disable...-centos-7/