Metal API Validation Enabled　が出て位置情報が取得できない

swift
1コード
2import UIKit
3import MapKit
4 
5class MapViewController: UIViewController {
6    
7    @IBOutlet weak var mapView: MKMapView!
8    //座標の配列
9    let coordinatesArray = [
10        ["name":"東京駅",    "lat":35.68124,  "lon": 139.76672],
11        ["name":"皇居外苑",   "lat":35.68026,  "lon": 139.75801],
12        ["name":"国立劇場",   "lat":35.6818,   "lon": 139.74326],
13        ["name":"九段下駅",   "lat":35.69555,  "lon": 139.75074]
14    ]
15 
16    override func viewDidLoad() {
17        super.viewDidLoad()
18        self.mapView.delegate = self
19        makeMap()
20    }
21    
22    func makeMap(){
23        //マップの表示域を設定
24        let coordinate = CLLocationCoordinate2DMake(coordinatesArray[0]["lat"] as! CLLocationDegrees, coordinatesArray[0]["lon"] as! CLLocationDegrees)
25        let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
26        let region = MKCoordinateRegion(center: coordinate, span: span)
27        self.mapView.setRegion(region, animated: true)
28        
29        
30        var routeCoordinates: [CLLocationCoordinate2D] = []
31        for i in 0..<coordinatesArray.count {
32            let annotation = MKPointAnnotation()
33            let annotationCoordinate = CLLocationCoordinate2DMake(coordinatesArray[i]["lat"] as! CLLocationDegrees, coordinatesArray[i]["lon"] as! CLLocationDegrees)
34            annotation.title = coordinatesArray[i]["name"] as? String //ピンの吹き出しに名前が出るように
35            annotation.coordinate = annotationCoordinate
36            routeCoordinates.append(annotationCoordinate)
37            self.mapView.addAnnotation(annotation)
38        }
39        var myRoute: MKRoute!
40        let directionsRequest = MKDirections.Request()
41        var placemarks = [MKMapItem]()
42        //routeCoordinatesの配列からMKMapItemの配列にに変換
43        for item in routeCoordinates{
44            let placemark = MKPlacemark(coordinate: item, addressDictionary: nil)
45            placemarks.append(MKMapItem(placemark: placemark))
46        }
47        directionsRequest.transportType = .walking //移動手段は徒歩
48        for (k, item) in placemarks.enumerated(){
49            if k < (placemarks.count - 1){
50                directionsRequest.source = item //スタート地点
51                directionsRequest.destination = placemarks[k + 1] //目標地点
52                let direction = MKDirections(request: directionsRequest)
53                direction.calculate(completionHandler: {(response, error) in
54                    if error == nil {
55                        myRoute = response?.routes[0]
56                        self.mapView.addOverlay(myRoute.polyline, level: .aboveRoads) //mapViewに絵画
57                    }
58                })
59            }
60        }
61    }
62}
63 
64extension MapViewController:MKMapViewDelegate {
65 
66    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
67        if annotation is MKUserLocation {
68            return nil
69        }
70        let reuseId = "pin"
71        var pinView = mapView.dequeueReusableAnnotationView(withIdentifier: reuseId)
72        if pinView == nil {
73            pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
74            pinView?.canShowCallout = true //吹き出しで情報を表示出来るように
75        }else{
76            pinView?.annotation = annotation
77        }
78        return pinView
79    }
80    
81    //ピンを繋げている線の幅や色を調整
82    func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
83        let route: MKPolyline = overlay as! MKPolyline
84        let routeRenderer = MKPolylineRenderer(polyline: route)
85        routeRenderer.strokeColor = UIColor(red:1.00, green:0.35, blue:0.30, alpha:1.0)
86        routeRenderer.lineWidth = 3.0
87        return routeRenderer
88    }
89    
90}