have an error "Cannot find "ThreeTestView" in scope."

have an error "Cannot find "ThreeTestView" in scope." but it is identified in scope though?

Can you provide your source code?

Error View:

//

//  GradesView.swift

//  FigureTests

//

//  Created by Julien Hage on 1/26/23.

//

import SwiftUI

struct GradesView: View {

    @Binding var presentationModeView:PresentationMode

    @Environment(.presentationMode) var presentationMode

    @State var OtestView = false

    @State var TtestView = false

    @State var ThreetestView = false

    @State var grades = 0

    var body: some View {

        VStack {

            Button {

                OtestView = true

                grades = 1

            } label: {

                Text("Grade one")

                    .bold()

            }

            

            Button {

                TtestView = true

                grades = 2

            } label: {

                Text("Grade two")

                    .bold()

            }

            

            Button {

                ThreetestView = true

                grades = 3

            } label: {

                Text("Grade three")

                    .bold()

            }

        }  .fullScreenCover(isPresented: $OtestView, content: {

            OTestView()//(presentationModeView: presentationMode)

        }

        )

        .fullScreenCover(isPresented: $TtestView, content: {

            TTestView()//(presentationModeView: presentationMode)

        }

        )

        

        .fullScreenCover(isPresented: $ThreetestView, content: {

         // Error here -->  ThreeTestView()

        }

        )

    }

}

Three test view:

    struct ThreeTestView: View {

        @State var EstartView = false

        var body: some View {

            VStack {

                Text("Hello Students! Today you will be taking a math test! Good Luck!")

                

                Button {

                    EstartView = true

                } label: {

                    Text("start test")

                        .bold()

                        .foregroundColor(.green)

                        .font(.largeTitle)

                    

                    

                }

            }  .fullScreenCover(isPresented: $EstartView, content: {

                ThreeMTestView()//(presentationModeView: presentationMode)

            }

            )

        }

    }

have an error "Cannot find "ThreeTestView" in scope."
 
 
Q