can not find placemark when search by japanese character

when I using MKLocalSearch by japanese character

 let request = MKLocalSearch.Request()
 request.naturalLanguageQuery =  "東京涩谷地下鉄駅"
request.region = mapView.region
 let search = MKLocalSearch(request: request)
search.start {....}

，it can not return the placemark，

shows Error : The operation couldn’t be completed. (MKErrorDomain error 4.). Failed to parse font key token: hiraginosans-w6 how can I fix this problem，thankyou！

import UIKit
import MapKit
 
class ViewController: UIViewController, MKMapViewDelegate  {
    
    @IBOutlet weak var resultsTableView: UITableView!
    var mapView: MKMapView!
    var searchResults = [MKMapItem]()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        mapView = MKMapView(frame: CGRect(x: 0, y: 220, width: view.bounds.width, height: view.bounds.height - (tabBarController?.tabBar.frame.size.height ?? 0)))
        
        mapView.showsScale = true
        mapView.showsCompass = true
        mapView.showsScale = true
        mapView.showsUserLocation = true
        mapView.userTrackingMode = .follow
        mapView.delegate = self
        view.addSubview(mapView)
  
        let selectedCoordinate = CLLocationCoordinate2D(latitude: 35.661777, longitude: 139.704051) // some Coordinate near 東京涩谷地下鉄駅
        let selectedLocation = CLLocation(latitude: selectedCoordinate.latitude, longitude: selectedCoordinate.longitude)
        
        let coordinateMKCoordinateRegion = MKCoordinateRegion(center: selectedLocation.coordinate, latitudinalMeters: 50000, longitudinalMeters:50000)
        mapView.setCenter( selectedLocation.coordinate, animated: true)
        mapView.setRegion(coordinateMKCoordinateRegion, animated: true)
        drawCircle(radius: 5000, center: selectedLocation.coordinate)
        searchForStation()
    }
    func drawCircle(radius: CLLocationDistance, center: CLLocationCoordinate2D) {
            let circle = MKCircle(center: center, radius: radius)
            mapView.addOverlay(circle)
        }
    
    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
        if let circleOverlay = overlay as? MKCircle {
                   let circleRenderer = MKCircleRenderer(circle: circleOverlay)
                   circleRenderer.fillColor = nil
                   circleRenderer.strokeColor = UIColor.blue
                   circleRenderer.lineWidth = 2.0
                   return circleRenderer
               }
        return MKOverlayRenderer(overlay: overlay)
    }
    func searchForStation() {
        print( "searchForStation" )
        let request = MKLocalSearch.Request()
        request.naturalLanguageQuery =  "東京涩谷地下鉄駅"  //
        request.region = mapView.region
        let search = MKLocalSearch(request: request)
        
        search.start { [weak self] (response, error) in
            guard let self = self else { return }
            guard let response = response, let mapItem = response.mapItems.first else {
                print("Error : \(error?.localizedDescription ?? "Unknown error").")
                return
            }
            
            for mapItem in response.mapItems {
       print( "mapItem.placemark =",mapItem.placemark) // hope to get 東京涩谷地下鉄駅placemark，the value of latitudeand  longitude）
             }
        }
    }
    
}