[ReVo_]

Array index out of bounds.

format(messageString, sizeof(messageString), "You've teleported to %s's %s", playerVehicleVariables[veh][pVehicleOwner], VehicleNames[playerVehicleVariables[veh][pVehicleModelID] - 400]);

playerVehicleVariables size?
VehicleNames size?

what value contains playerVehicleVariables[veh][pVehicleModelID] ?

(Your code is long so i dont want to read, but this problem might be caused by this.)

Use crashdetect plugin to detect this problem easily.