Blank white box popup on android device, instead of purchase confirmation

Targets Android
4

Hmm the code I am using is almost identical to yours. In fact I took inspiration from this post.

My Activity1.cs class has:

protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);
    Xamarin.Essentials.Platform.Init(this, bundle);

    _game = new Game1();
    _view = _game.Services.GetService(typeof(View)) as View;
    
    SetContentView(_view);
    _game.Run();
}

And my thread method is in my game implementation is (I have omitted most of the functional code to reduce noise in this thread):

private async void MakePurchase(string productId)
{
    var purchaseIsSuccessful = await ExecutePurchase(productId, "");
    if (purchaseIsSuccessful)
    {
        //PURCHASE SUCCESSFUL
    }
    else
    {
        //PURCHASE FAILED
    }
}

private async Task<bool> ExecutePurchase(string productId, string payload)
{
    var billing = CrossInAppBilling.Current;
    try
    {
        await billing.ConnectAsync();
        var purchase = await billing.PurchaseAsync(productId, ItemType.InAppPurchaseConsumable, payload);
        // purchase handling
    }
    catch (InAppBillingPurchaseException purchaseEx)
    {
        // error handling
    }
    finally
    {
        await billing.DisconnectAsync();
    }

    return false;
}

Where I then execute the MakePurchase method with the product id such as:

MakePurchase("android.test.purchased");

I still don’t understand how/why this problem occurs.