SwiftUI Tutorial: Building Lists and Navigation - [Cannot find 'coordinates' in scope] Error

I'm pretty new to SwiftUI, so I started the Apple tutorial and followed the steps pretty closely, but I have come across this error at step 7 that says "Cannot find 'coordinates' in scope". I did a bit of searching and could not find anyone with the same problem, so I thought I'd post here.

import Foundation
import SwiftUI
import CoreLocation

struct Landmark: Hashable, Codable {
    var id: Int
    var name: String
    var park: String
    var state: String
    var description: String
    
    private var imageName: String
    var locationCoordinate: CLLocationCoordinate2D {
        CLLocationCoordinate2D(
            latitude: coordinates.latitude,
            longitude: coordinates.longitude)
    }
    
    var image: Image {
        Image(imageName)
    }
    
    struct Coordinates: Hashable, Codable {
        var latitude: Double
        var longitude: Double
    }
}

As far as I can tell, everything here is exactly as it is supposed to be. Could the tutorial be a different version of Xcode? Maybe this is a bug? I am not sure.

If any of the other code from the project is relevant I can add that. Any help is appreciated!