Why it' sayng falgged as spam?

I installed the cars as OIV in the file mods ,there not many choices while installing it as OIV file.
The cars are installed in the folder "dlcpacks" how i check it from readme file it's correct.

Thank you for your time for start.
So i istall them and it's start working for few mins , then it crashed after 3-4 mins of gaming every time i try to play.
I notice that the car's i have installed there not exist in spawn list. I tried different tainers but the list was the same liek nothing new installed. Does i need to install something else ?

@Algonquin1234 so once i did that . i try all the gameconfig's some was the same crashed without error some gave me this msg
I have 16gb ram and 6 vram so memory probably is not the issue in this case

@Algonquin1234 the nvr is one week old installed, the game is start crashing once i start installing cars mods, once i remove them everything is fine. Game version is 1.36, i install mods only via OIV. Just wanted NVR and few cars (8) nothing more, but it's keep crashing from the first car installation.

I remove it, so now it's crashing without any error msg just on the loading screen after few seconds 5-7 seconds

So i have installed only Natural vision remastered , once i try to install car mods it' sta tring to crashing on or wont starting the game. I installing the mods via oiv installation .

the mod link
https://www.gta5-mods.com/vehicles/mercedes-amg-gt63-s-coupe