Viewing files in RAW shows empty screen

Hello, I know there are several issues about it, but they're closed and I can't fix it.

I'm using nginx with a non bundled server and I have exactly the same issue. Raw pages are empty and when I download a resource, the size is 0 byte. I've tried all configs I see on the internet about nginx/gitlab... Nothink works :/ The last config I tried is : https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/doc/settings/nginx.md#vhost-server-block

I tried to apt update, apt upgrade, gitlab-ctl reconfigure etc... But nothing :(

I have exactly the same issue of Alex here : #14612 (closed)

I really need help, Thanks !