Standard code gives an error

I chose to use the standard code created by selecting "Augmented Reality App" in Xcode and using it.

But I get the error Use of unresolved identifier 'Experience'

How can I solve this?

ARView.swift

import SwiftUI
import RealityKit

struct ARViewContainer: UIViewRepresentable {
   
    func makeUIView(context: Context) -> ARView {
       
        let arView = ARView(frame: .zero)
       
        // Load the "Box" scene from the "Experience" Reality File

        let boxAnchor = try! Experience.loadBox()
       
        // Add the box anchor to the scene
        arView.scene.anchors.append(boxAnchor)
       
        return arView
       
    }
   
    func updateUIView(_ uiView: ARView, context: Context) {}
   
}

ARKitView.swift

import SwiftUI

struct ARKitView: View {
    var body: some View {
        return ARViewContainer().edgesIgnoringSafeArea(.all)
    }
}

struct ARKitView_Previews: PreviewProvider {
    static var previews: some View {
        ARKitView()
    }
}

Experience.rcproject

「Box」Seen