New Post: MissingManifestResourceException publishing from windows phone 8.1 app

private async Task PublishTweet()
    {
        StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync("shareImage.png");
        var credentials = TwitterCredentials.CreateCredentials(App.localSettings.Values["TwitterAccessToken"].ToString(), App.localSettings.Values["TwitterAccessTokenSecret"].ToString(), "XXX", "XXX");

        TwitterCredentials.SetCredentials(credentials);
        byte[] file1 = await ReadFile(file);
        var shareTweet = Tweet.CreateTweet(App.ViewModel.CurrentItem.Description + " #" + ResourceLoader.GetForCurrentView().GetString("Hashtag"));
        shareTweet.AddMedia(file1);

        var result = await shareTweet.PublishAsync();

}

var result = await shareTweet.PublishAsync();