Auth0 swift webview invalid request

Thanks for help.

I tried your suggestions but I had no result. I did not understand the point 7: how can I enable debugging? Can you explain it better please?

For give you more informations, this is for now the code that I use to call the login interface in my app:

let launchUrl = SceneDelegate.universalLinkToLaunch ?? SceneDelegate.shortcutLinkToLaunch ?? rootUrl;
            SmartAirfield.webView.load(URLRequest(url: launchUrl))

In the past we not used the Auth0 package, I installed now and I’m trying also another approach with this function:

func login() {
      Auth0
        .webAuth()
        .start { result in
            
          switch result {
                  
            case .failure(let error):
              // The user either pressed the “Cancel” button
              // on the Universal Login screen or something
              // unusual happened.
              if error == .userCancelled {
                let alert = UIAlertController(
                  title: "Please log in.",
                  message: "You need to log in to use the app.",
                  preferredStyle: .alert)
                alert.addAction(
                  UIAlertAction(
                    title: NSLocalizedString(
                      "OK",
                      comment: "Default action"
                    ),
                    style: .default,
                    handler: { _ in
                      NSLog("Displayed the \"Please log in\" alert.")
                }))
                self.present(alert, animated: true, completion: nil)
              
              } else {
                print("An unexpected error occurred: \(error.localizedDescription)")
              }
            
            case .success(let credentials):
              // The user successfully logged in.
              self.userIsAuthenticated = true
              self.user = User.from(credentials.idToken)
                          
              DispatchQueue.main.async {
              }
                        
          } // switch
            
        } // start()
    }

but for now nothing. I’m new to swift programming.

Anyway, another detail is that the error that I described is shown when the user finish the login phase. For make an example: I open the app, I choose login with google, I put email and password, and after the login is successful the user is redirect in the page that give the error.