I have newly installed server via linuxgsm in Linux ubuntu 18.04 64 bit OS, it has no issues. The skins replaced the original one even after area_zombies script is stopped. The skins go away after 3 4 days, idk what happened. I tried to use that script after removing skins files (from meta and all txd) so that zombies are normals peds but still the skin is replaced with the zombies one. Maybe something funny with script is going on!