Unreal Engine: UNavigationSystemV1::ProjectPointToNavigation is not working in editor, always returns false

Development Programming & Scripting C++
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1

I’m trying to find the closest point on navmesh in the editor. The Navigation is built but this method is always returns false with any extent. Also, UNavigationSystemV1::GetMainNavData() is always nullptr. Is it possible to access navdata in editor?

    UNavigationSystemV1* NavSys = FNavigationSystem::GetCurrent<UNavigationSystemV1>(GetWorld());
    ANavigationData* NavData = NavSys->GetDefaultNavDataInstance();

    if (!NavSys->ProjectPointToNavigation(CoverPosition, ProjectedPosition, FVector(2.f * CapsuleRadius, 2.f * CapsuleRadius, 2.f * StandCoverHeight)))
    {
        return false;
    }

    CoverPosition = ProjectedPosition.Location;
2 
What happen if do it that way?

bool bChecker = false;
if (NavSys->ProjectPointToNavigation(CoverPosition, ProjectedPosition, FVector(2.f * CapsuleRadius, 2.f * CapsuleRadius, 2.f * StandCoverHeight)))
    {
        bChecker = 1;
    }else{bChecker  =  0; }

if(bChecker)
{
   //print string  using gengine or any macro if you have with message Success NavSys
    CoverPosition = ProjectedPosition.Location;
}
else 
{ 
   //print string  using gengine or any macro if you have with message UnSuccess NavSys
    return:
}