Qlik Insight Bot NLU Refused Connection

[pedrobergo]

Hi,

We create a machine follow the https://help.qlik.com/en-US/insight-bot/Content/QlikInsightBot/Home.htm instructions.

When we open the Insight Webchat extension at trained app, the QIB does not give any response. 

The browser send ERR_CONNECTION_RESET and ERR_CONNECTION_REFUSED.

When try to connect the https://localhost:4431 directly from browser they send us ERR_CONNECTION_REFUSED.

We using Setember2019 Qlik Insigt Bot and Qlik Sense Enterprise.

All other services are reachable.

How can I fix it?