cannot find VehicleObstacleControl module -- in module (veins::PhyLayer80211p) in a V2I scenario

Question

I have encountered a critical issue in veins-5.2 simulation in the vehicle obstacle shadowing model for a V2I scenario as follows.

initializeVehicleObstacleShadowing(): cannot find VehicleObstacleControl module -- in module (veins::PhyLayer80211p) RSUExampleScenario.rsu[0].nic.phy80211p (id=11), during network initialization

However, I can find VehicleObstacleControl module in the veins::PhyLayer80211p.cc as follows.

**unique_ptr<AnalogueModel> PhyLayer80211p::initializeVehicleObstacleShadowing(ParameterMap& params)
{
    // init with default value
    bool useTorus = world->useTorus();
    const Coord& playgroundSize = *(world->getPgs());
    ParameterMap::iterator it;
    VehicleObstacleControl* vehicleObstacleControlP = VehicleObstacleControlAccess().getIfExists();
    if (!vehicleObstacleControlP) throw cRuntimeError("initializeVehicleObstacleShadowing(): cannot find VehicleObstacleControl module");
    return make_unique<VehicleObstacleShadowing>(this, *vehicleObstacleControlP, useTorus, playgroundSize);
}**

I highly appreciate if you could provide me with some guidance so that I can resolve this problem.

Thank you in advance.