Advice to fix my code, trying to learn how to develop in Xcode

Hello can I have some help on how to fix the code. Please can you tell me what to adjust to make the code work.(it was from a YouTube video and have compared it as close as possible and still doesn't work. 'No exact matches in call to initialiser' error at the work 'Group {'

import SwiftUI

struct ContentView: View    {
    @State var text: Array<String> = []
    @State var showsheet = false
    @State var textitemtemp = ""
    var body: some View {
        NavigationView  {
            Group {
                if text.count  <= 1 {
                    Text("no items")
                }  else {
                    List    {
                        ForEach((1...text.count-1, id: \.self), {i in
                        Text(text[i])
                            .contextMenu    {
                                Button(action:   {
                                    text.remove(at: i)
                                }, label:   {
                                    Label ("Delete", systemImage: "delete.left")
                                })
                            }
                    }
                )
            }
                    
                    
                    .navigationTitle("Idea Book")
                    .toolbar {
                        Button(action:  {
                            showsheet.toggle()
                            textitemtemp = ""
        
                            
                        }, label:   {
                            Image(systemName: "plus")
                        } )
                    }
                    .onChange(of: text) {
                        save()
                        load()
                    }
                    .onAppear() {
                        save()
                        load()
                    }
                }
                    .refreshable {
                        save()
                        load()
                    }
                    .sheet(isPresented: $showsheet) {
                        NavigationView  {
                            List    {
                                TextField("Item", text: $textitemtemp)
                            }
                            .navigationTitle("Add an Idea")
                            .toolbar    {
                                Button("add")   {
                                    text.append(textitemtemp)
                                    showsheet.toggle()
                                }
                            }
                        }
                    }
                
                
                
                func save() -> Void     {
                    let temp = text.joined(separator:   "/[split]/")
                    let key = UserDefaults.standard
                    key.set(temp, forKey: "text")
                }
                func load() -> Void     {
                    let key = UserDefaults.standard
                    let temp = key.string(forKey: "text") ?? ""
                    let temparray = temp.components(separatedBy:"/[split]/")
                    text = temparray
                }
            }
            #if DEBUG
                ContentView()
            #endif
            }
        }
    }