I have no npc vehicles in my game

I dont know if im doing something wrong but i tried doing the event with the jesko n have to get 8 near misses i got on the highway an realized there were zero npc cars anywhere. When i played the first time on the 5th they were all over but now there are none. I do see other real players but thats it. Anyone that might have an idea that would b awesome. Maybe its a bug or something