crash when loading a map

hi guys , ive recently changed pc and reinstalled U E4 but a specific map in my project is crashing the entire thing while loading…

here’s the log :

[2018.10.13-15.12.43:490][708]LogWindows: Error: === Critical error: ===
[Line: 193]

[2018.10.13-15.12.43:490][708]LogWindows: Error: Ran out of memory allocating
268435456 bytes with alignment 0

i don’t really know what i’m supposed to do here :confused: