LiveChat and ngrok for Agent transfer

I am trying to do an agent transfer to LiveChat (agent software) using BotKit-8.1 of SDK.

The procedure was referred to the one in the following link.

I think I can get the ngrok server up and running, and the messages from are being received well.

However, LiveChat is not receiving any messages.
I’m wondering if there is a problem with the LiveChat API.
For reference, here is the LiveChat API that I am using now.

Can anyone tell me the cause and what I need to do to forward the agent?

I have the same issue, it seems Kore Docs are not update because livechat website change a lot and seems the APIs are not the same

Thank you for contacting me.
I understand the situation.