I think there is an issue with the installer. Had this same problem on a fresh install of CentOS with another community member. Me.B
All files and folders inside /etc/sentora/ should be owned by www-data:www-data in your case.
You will need to change the owner. Apache is running the unzip and can't write the files since the folders are owned by root.
All files and folders inside /etc/sentora/ should be owned by www-data:www-data in your case.
You will need to change the owner. Apache is running the unzip and can't write the files since the folders are owned by root.