Fixed the project screenshots and downloads
I finally found the proper fix for downloads and screenshots to work again in the projects' files: it was a permission problem [1]. A work-around is currently in place.
[1] https://www.defora.org/os/project/bug_display/897/Project-file-uploads-are-only-allowed-for-site-global-administrator?bug_id=34
[1] https://www.defora.org/os/project/bug_display/897/Project-file-uploads-are-only-allowed-for-site-global-administrator?bug_id=34