What's causing 500 Internal Server Error due to localhost:9000 being hit in bot framework?

Question

Getting this error every time I try to send a message to my bot, or after it responds with 3 messages in a row.

I put a try/catch around the code that\'s ge

Answer 1

We were having a similar issue in our app. Managed to resolve the 500 Invalid responses by not having a private LuisResult property in our dialog class that derived from LuisDialog.

I guess as the class was marked as Serializable it tried to serialize all the properties and a LuisResult can't be serialized.

Here's a code snippet:

Change:

[Serializable]
public class YourDialog : LuisDialog
{
    private LuisResult _myPrivateProp;
}

To:

[Serializable]
public class YourDialog : LuisDialog
{
    private string _myPrivateProp;//or whatever
}