Connecting Blueprint to player

I’m trying to hook a Blueprint to my pawn character the same way that i did it in the past with no issues in the GameMode CPP like:

static ConstructorHelpers::FClassFinder<APawn> PlayerPawnBPClass(TEXT("Blueprint'/Game/blueprint/Copter'"));
	if (PlayerPawnBPClass.Class != NULL)
	{
		DefaultPawnClass = PlayerPawnBPClass.Class;

	}

but it’s not doing anything

am I doing something wrong ?

Deleting the movable Viewport character fixed it