Microsoft Bot Framework的Bing位置控制:Facebook Messenger中的键入地址不起作用

我正在使用Microsoft Framework bot Sdk for C#构建机器人.我已将漫游器连接到Facebook频道.我已经将内置的位置对话框选择器实现为FB Messenger的位置选择器GUI对话框，如下所示:

I am building bot with Microsoft Framework bot Sdk for C#. I have connected bot to Facebook Channel. I have implemented built in location dialog picker as FB Messenger's location picker GUI dialog as following:

var apiKey = WebConfigurationManager.AppSettings["BingMapsApiKey"];
var prompt = "Where should I ship your order? Type or say an address.";
var locationDialog = new LocationDialog(apiKey, message.ChannelId, prompt, 
LocationOptions.UseNativeControl | LocationOptions.ReverseGeocode);
context.Call(locationDialog, (dialogContext, result) => {...});

(来自 https://github.com/Microsoft/BotBuilder-Location/blob/master/CSharp/README.md )

但是，当我尝试输入地址时，它会再次提示消息点击发送位置以继续；键入或说取消以退出". Facebook对话框图片

However, when I try to type in the address it re prompts the message "Tap on Send Location to proceed; type or say cancel to exit." Facebook dialog picture

我不明白为什么不允许我输入地址?

I do not understand why it does not allow me to type in the address?