Airbyte giving "localhost refused to connect error" while visiting http://localhost:8000/

We followed the steps provided in the url Local Deployment | Airbyte Documentation to run Airbyte in ou local system. We were able to complete all the steps but while visiting the url : Local Deployment | Airbyte Documentation its giving refused to connect error.

We are planning to do a POC on Airbyte and if it works we will posiiton the tool to be used for data migration at the enterprise level.