North Arrow not changing

Question

ArcGIS Pro 3.1 SDK addin is not changing the north arrow using this code:

// Add North Arrow
StyleProjectItem arcgis2dStyles = Project.Current.GetItems<StyleProjectItem>().First(si => si.Name == "ArcGIS 2D");
await QueuedTask.Run(() =>
{
NorthArrowStyleItem naStyleItem = arcgis2dStyles.SearchNorthArrows("ArcGIS North 13").FirstOrDefault();
MapFrame newFrame = layout_local.FindElement("New Map Frame") as MapFrame;
Coordinate2D nArrow = new Coordinate2D(3.6814, 0.6357);
var naInfo = new NorthArrowInfo()
{
MapFrameName = newFrame.Name,
NorthArrowStyleItem = naStyleItem
};
var newNorthArrow = ElementFactory.Instance.CreateMapSurroundElement(layout_local, nArrow.ToMapPoint(), naInfo);
});

I want this one:

But I get this one no matter what I put in here (SearchNorthArrows("ArcGIS North 13")):

mstranovsky · Accepted Answer

I tried it and receive this error:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

naStyleItem was null.

CharlesMacleod · Accepted Answer

that's why yours doesnt work then. Check your ArcGIS 2D style and why it doesnt contain a "ArcGIS North 13"