Hey y'all. I have an error and I don't know the cause of it. Can you guys help me? The error is:

Failed to produce diagnostic for expression; please file a bug report.

There is my SettingsView swift ui page:

import SwiftUI

struct SettingsView: View {

    @Environment(\.presentationMode) var presentationMode

    var body: some View { // This is where the error shows...
        NavigationView{
            VStack(alignment: .center, spacing: 0){
                Form{

                Section(header: Text("Follow us on Social Media")) {
                    FormRowLinkView(icon: "play.fill", color: Color.red, text: "Youtube", link: "https://www.youtube.com/channel/UCswacy5CsFf_TM2ihFf53MQ")
                    FormRowLinkView(icon: "person.crop.circle.badge.plus", color: Color.blue, text: "Twitter", link: "https://twitter.com/harrinandhaanSN")
                    FormRowLinkView(icon: "person.circle", color: Color.blue, text: "Facebook", link: "https://www.facebook.com/harrinandhaan.sathishnirmala")
                    FormRowLinkView(icon: "camera.circle.fill", color: Color.purple, text: "Instagram", link: "www.instagram.com/real_harrinandhaan_sn")
                    }

                .padding(.vertical, 3)

                    Section(header: Text("About the Application")) {
                        FormRowStaticView(icon: "gear", firstText: "Application", secondText: "SMK.")
                        FormRowStaticView(icon: "checkmark.seal", firstText: "Compatibility", secondText: "iPhone")
                        FormRowStaticView(icon: "keyboard", firstText: "Developer", secondText: "Harrinandhaan SN")
                        FormRowStaticView(icon: "paintbrush", firstText: "Designer", secondText: "Harrinandhaan SN")
                        FormRowStaticView(icon: "flag", firstText: "Version", secondText: "1.0.0")
            }
                    .padding()

                }
                    .listStyle(GroupedListStyle())
                .environment(\.horizontalSizeClass, .regular)

            Text("Copyright Sai Mirras Kitchen.\nHarrinadhaan Sathish Kumaar Nirmala")
                .multilineTextAlignment(.center)
                .font(.footnote)
                .padding(.top, 6)
                .padding(.bottom, 8)
                .foregroundColor(Color.secondary)
        }

            .navigationBarItems(trailing: Button(){
                self.presentationMode.wrappedValue.dismiss()
            }) {
                Image(systemName: "xmark")
            }
            .navigationBarTitle("Settings", displayMode: .inline)
            .background(Color("ColorBackground")).edgesIgnoringSafeArea(.all)
    }
}
}
struct SettingsView_Previews: PreviewProvider {
    static var previews: some View {
        SettingsView()
    }
}

Please help me.

Your navigation button is not correct.

Instead of:

            .navigationBarItems(trailing: Button(){
                self.presentationMode.wrappedValue.dismiss()
            }) {
                Image(systemName: "xmark")
            }

do this:

            .navigationBarItems(trailing: Button {
                self.presentationMode.wrappedValue.dismiss()
            } label: {
                Image(systemName: "xmark")
            })

And, really, you should start using the new toolbar API instead, as navigationBarItems is deprecated. Same with navigationBarTitle; you should be using navigationTitle and navigationBarTitleDisplayMode instead. If you still need to target iOS 13, do an availability check and the use the correct method.

@roosterboy

Thanks!😁