Permissions Problem on Installation (shown as non-writable even if they are writable)
When installing Ixonn you can encounter problem in the files/folders permission step all required permissions to be marked as non writable even if they are writable.
This issue can cause mostly on VPS servers where the server administrator didn’t configured the folder permissions like its supposed to. While using some popular hosting provider you wont encounter with this problem.
The numeric permissions are fine for the folders, but the problem is that they don’t have the right user and group.
Change them to www-data (Debian) or apache (CentOS).
You read more about this here.
If this still don’t solve your problem you can try disabling SELinux and check if will work good.