Map not loading correctly


Hey so i only have one problem and that is that when i join a server the map loads in really badly like bad quality and if i drive a for a little bit away from where i spawned i fall through the map due to the map not loading in.
I have tried reinstalling didnt help. I lowered my graphic settings didnt work. So i dont know like what else i could do. So i hope you can help me with this problem and i could enjoy fivem to the fullest.
( And the map is the vanilla map.)