Hi @Polsys, thank you and your programmer for the efforts ! I think that this happening is similar to the previous explained behaviours (ie. regenerated thumbnails are accessible / original uploaded file returns 403). From my side, I did some other tests by deploying some local VMs and I was able to reproduce the problem only in a Centos 6.8 + Plesk 12.5.3 + PHP-FPM served by Nginx stack with Atomic Repository packages. No way to reproduce the issue in Centos 7 (on the same domain). Do you have, by chance, Atomic Repository packages ?