Question WINSDKFB for UWP Error When Trying to Open Login Dialog

Hello...
Has anyone integrated Unity Facebook in UWP ? There is Facebook SDK for Unity but it doesn't support UWP. I have tried using winsdkfb to show login dialog, but I got an error at LoginAsync. (error attached) I use InvokeOnUIThread from unity so the LoginAsync runs on UI thread.
(Build setting and player setting are attached)

Note: I make empty C# UWP app from visual studio (not from unity) and using same winsdkfb. And the app can successfully show login dialog.

my unity C# code:

Code (CSharp):

1. private void OnLoginButtonClick()
2.     {
3. #if UNITY_WSA && ENABLE_WINMD_SUPPORT
4.         SessionLoginBehavior loginBehavior = SessionLoginBehavior.WebView;
5.         FBSession sess = FBSession.ActiveSession;
6.         sess.FBAppId = "xxxxxxxx";
7.         sess.WinAppId = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
8.         List<String> permissionList = new List<String>();
9.         permissionList.Add("user_friends");
10.         permissionList.Add("user_photos");
11.         FBPermissions permissions = new FBPermissions( permissionList );
12.  
13.         UnityEngine.WSA.Application.InvokeOnUIThread(async () =>
14.         {
15.             FBResult result = await sess.LoginAsync(permissions, loginBehavior);
16.             if (result.Succeeded)
17.             {
18.                 FBUser user = sess.User;
19.                 UnityEngine.Debug.Log(sess.User.Id);
20.                 UnityEngine.Debug.Log(sess.User.Name);
21.             }
22.             else
23.             {
24.                 UnityEngine.Debug.Log("login failed");
25.             }  
26.         }, waitUntilDone: true);
27.  
28. #endif
29.     }

... or maybe there is another sdk for UWP to login facebook ???

 

Yes, my build setting is xaml. My screen shoot is error from solution generated by unity uwp XAML type.
(I edit my question with Build setting and player setting are attached)

 

I'm stuck here, too. Is it resolved?