did you try disabling all of your addons

well i have only scripts like ammo crawl and goes on thats means i dont have mods on survivors and i just tested for some reason it didnt crash (btw game crashed on sis land)

try putting precache_all_survivors 1 and +sb_transition 1 in your startup parameters
(some script addons mess with the latter setting which is one of the causes behind this crash)

ok i will try thanks

it didnt help

Scripted addons tend to make the map crash, you will have to disable them while playing this map.

I use a script to have an ammo pool for the m60 and refillable ammo for the grenade launcher, made the chapter 5 crash everytime.

Edit : Alright after testing again, it seems that it was not the m60 script but skins for common infected that make the chapter 5 crash, i don't use skin for specials so i would avoid both just to be sure.

so i fixed this it was project smok