Hello, I'm new here. I got Preview Crashed in 2nd SwiftUI Essential Tutorial (Building List & Navigation) when I change longitude and latitude to my office and wrapped it's detail in LandmarkDetail.swift (crashed here). But it running well in MapView.siwft and CircleImage.swift. Here is my code : //MapView.swift import SwiftUI import MapKit struct MapView: View {     var coordinate: CLLocationCoordinate2D     @State private var region = MKCoordinateRegion()     var body: some View {         Map(coordinateRegion: $region)             .onAppear {                 setRegion(coordinate)             }     }     private func setRegion(_ coordinate: CLLocationCoordinate2D) {         region = MKCoordinateRegion(             center: coordinate,             span: MKCoordinateSpan( latitudeDelta: 0.005, longitudeDelta: 0.005)         )     } } struct MapView_Previews: PreviewProvider {     static var previews: some View {         MapView(coordinate: CLLocationCoordinate2D( latitude: -6.256108, longitude: 106.880838)) //custom location, instead of default on tutorial     } } //CircleImage.swift import SwiftUI struct CircleImage: View {     var image: Image     var body: some View {         image             .resizable()             .frame(width: 250, height: 250, alignment: .center)             .clipShape(Circle())             .overlay {                 Circle().stroke(.white, lineWidth: 4)             }             .shadow(radius: 7)     } } struct CircleImage_Previews: PreviewProvider {     static var previews: some View {         CircleImage(image: Image("bkkbn")) //custom image, instead of default on tutorial     } } //landmarkData.json [ {         "name": "Lake Umbagog",         "category": "Lakes",         "city": "Errol",         "state": "New Hampshire",         "id": 1012,         "isFeatured": false,         "isFavorite": false,         "park": "Umbagog National Wildlife Refuge",         "coordinates": {             "longitude": -71.056816,             "latitude": 44.747408         },         "description": "Suscipit inceptos est felis purus aenean aliquet adipiscing diam venenatis, augue nibh duis neque aliquam tellus condimentum sagittis vivamus, cras ante etiam sit conubia elit tempus accumsan libero.",         "imageName": "umbagog"     },     {         "name": "Pusat",         "category": "Office",         "city": "Jakarta Timur",         "state": "Jakarta",         "id": 1013,         "isFeatured": true,         "isFavorite": true,         "park": "Kantor Pusat",         "coordinates": {             "longitude": -6.256108,             "latitude": 106.880838         },         "description": "Ini adalah kantor pusat.",         "imageName": "bkkbn"     } ] //LandmarkDetail.swift import SwiftUI struct LandmarkDetail: View {     var landmark: Landmark     var body: some View {         ScrollView {             MapView(coordinate: landmark.locationCoordinate)                 .ignoresSafeArea(edges: .top)                 .frame(height: 350)             CircleImage(image: landmark.image)                 .offset(y: -130)                 .padding(.bottom, -130)             VStack(alignment: .leading) {                 Text(landmark.name)                     .font(.title)                 HStack {                     Text(landmark.park)                         .font(.subheadline)                     Spacer()                     Text(landmark.state)                         .font(.subheadline)                 }                 .font(.subheadline)                 .foregroundColor(.secondary)                 Divider()                 Text("Deskripsi \(landmark.name)")                     .font(.title3)                     .foregroundColor(.secondary)                 Text(landmark.description)             }             .padding()         }         .navigationTitle(landmark.name)         .navigationBarTitleDisplayMode(.inline)     } } struct LandmarkDetail_Previews: PreviewProvider {     static var previews: some View {         LandmarkDetail(landmark: landmarks[1])     } } Big thanks for any help or explanation.