Getting could not create an native instance of the type 'JumioNetverifyBinding.NetverifyConfiguration' the native class hasn't been loaded exception - objective-c

Question

I am trying to bind Jumio Natverify library in Xamarin iOS project by creating Objective c library project.
I have crated ApiDefination.cs and Struct.cs file data using sharpie tool. But when I am trying on run it I am getting Could not create an native instance of the type 'JumioNetverifyBinding.NetverifyConfiguration': the native class hasn't been loaded. exception.
ApiDefinition class - ApiDefinition.cs
Struct class - Struct.cs
Called NetverifyViewController from iOS Binding project:
using Foundation;
using JumioNetverifyBinding;
using System;
using UIKit;
namespace JumioNetverifyDemo
{
public partial class ViewController : UIViewController
{
NetverifyViewController netverifyViewController;
public ViewController(IntPtr handle) : base(handle) { }
public override void ViewDidLoad()
{
StartNetverifyButton.TouchUpInside += startNetverify;
}
public void CreateNetverifyController()
{
NetverifyConfiguration config = new NetverifyConfiguration();
config.ApiToken = "My_token_key";
config.ApiSecret = "Secrate_key";
config.DataCenter = JumioDataCenter.Eu;
config.Delegate = new NetverifyViewControllerDelegateHandler(this);
this.netverifyViewController = new NetverifyViewController(config);
}
public void startNetverify(object sender, EventArgs e)
{
this.CreateNetverifyController();
if (this.netverifyViewController != null)
{
this.PresentViewController(netverifyViewController, true, null);
}
else
{
Console.WriteLine("Netverify Mobile SDK : NetverifyViewController is null");
}
}
public void DisplayAlertAsync(string title = "Alert", string message = "")
{
var okAlertController = UIAlertController.Create(title, message, UIAlertControllerStyle.Alert);
okAlertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(okAlertController, true, null);
}
public class NetverifyViewControllerDelegateHandler : NetverifyViewControllerDelegate
{
private ViewController _viewController;
public NetverifyViewControllerDelegateHandler(ViewController viewController)
{
_viewController = viewController;
}
public override void DidCancelWithError(NetverifyViewController netverifyViewController, NetverifyError error, string scanReference, string accountId)
{
Console.WriteLine("NetverifyViewController did finish initializing, error:" + error.Message);
_viewController.DisplayAlertAsync("Error : " + error.Message);
}
public override void DidFinishWithDocumentData(NetverifyViewController netverifyViewController, NetverifyDocumentData documentData, string scanReference, string accountId, bool authenticationResult)
{
_viewController.DisplayAlertAsync("Scan Reference : " + scanReference);
}
}
}
}
I am looking for anyway to handle this exception and make this library work, if anyone have idea about this? Any help would be appreciated.