I´m trying to download website that starts with a login:

<https://app.iclinic.com.br/usuarios/login/>

user:gelcom@uol.com.br
password:Lixolixo1

when I try to copy the entire site to my machine I get an error.

What´s the correct way to do this?
if I go to Capture URL and set the proxy on Firefox as HTTrack tells me after
loggin in I get the web page that says:

"The proxy server is refusing connections.
Firefox is configured to use a proxy server that is refusing connections. ...


What am I doing wrong?
kind regards