Can't access backup zip - Permission error.

[Fuzzy]

I get a 403 Forbidden error if I create a backup and then try to download it from Sentora.
How can I make this work?

Code:

Forbidden

You don't have permission to access /etc/tmp/zadmin_Oct-14-2015_121016.zip on this server.

The file itself is owned by "www-data" and has 777 permissions.
The "tmp" folder is owned by root with the same 777 permissions if that's any help at all.