NEHotspotConfigurationManager - iPhone internal error

Hello everyone, I tried to make my iPhone change the Wifi network using Xamarin.iOS.

I have already contacted the Xamarin service who told me that the programming is translated 1:1 with Swift and that the problem is an internal iPhone error.

My code is:

public class ConnectToWifi : IConnectToWifi
{
     string SSID;
     public string Password;
     public IPAddress ServerAddress;
     int ServerPort = -1;
     public bool isConnect = true;
     public CFSocket Socket;
     public CFSocket ServerSocket;
     NEHotspotConfigurationManager wifiManager;
     
     public ConnectToWifi()
     {

         wifiManager = new NEHotspotConfigurationManager();
     }

     public async Task<bool> Connect(string Ip, int Port)
     {
         isConnect = false;
         ServerPort = Port;
         try
         {
             ServerAddress = new IPAddress(IPAddress.Parse(Ip).GetAddressBytes());
             Socket = new CFSocket();
                   NEHotspotConfigurationManager.SharedManager.GetConfiguredSsids((listWifi) =>
                   {
                       if (listWifi != null)
                       {
                           foreach (string ssid_selected in listWifi)
                           {
                               
                               if (ssid_selected == SSID)
                               {
                           NEHotspotConfigurationManager.SharedManager.RemoveConfiguration(SSID);
                               }
                           }
                       }
                   });
             NEHotspotConfiguration wifiNetwork = new NEHotspotConfiguration(SSID, Password, false);
             wifiNetwork.JoinOnce = true;
             wifiManager.ApplyConfiguration(wifiNetwork, (error) =>
                 {
                     if (error != null)
                     {
                         System.Diagnostics.Debug.Write(error.Description);
                     }
                     else
                     {
                         System.Diagnostics.Debug.Write("Connected");
                     }
                     isConnect = true;
                 });
         }
         catch (CFSocketException exception)
         {
             System.Diagnostics.Debug.WriteLine("Ho ricevuto questo errore nella Connect: " + exception.Message);
             return isConnect;
         }
         catch (Exception ex)
         {
             System.Diagnostics.Debug.WriteLine("Ho ricevuto questo errore nella Connect: " + ex.Message);
             return isConnect;
         }
         return isConnect;      
     }
}

Upon connection comes the wifiManager function.ApplyConfiguration returns the following error:

ErrorDomain=NEHotspotConfigurationErrorDomain Code=8 "internal error." UserInfo={NSLocalizedDescription=internal error.}

I have an iPhone X with iOS 14.6  and a MacBook with:

• MacOS Big Sur 14.5;
• Xcode Version 12.5.1;
• Visual Studio for Mac 8.10.7;
• Xamarin.iOS 14.20.0.24 (Visual Studio Community);

In my AppID profile and in the Entitlements.plist file I have activated the following services:

• Access WiFi Information;
• Fonts;
• Hotspot;
• Network Extensions;

Thank you very much for helping!

Regards,

Giacomo Ferrera