Even after passing the credentials to the server, I am getting the error (Error Code: NL-HTTPERROR-01)

Error Details are :Error Code: NL-HTTPERROR-01 Message: Internal error: An HTTP error occurred sending the request. Details: org.eclipse.jetty.client.HttpResponseException: Received HttpContentResponse[HTTP/1.1 407 Proxy Authentication Required - 938 bytes] for HttpRequest[CONNECT / HTTP/1.1]@70032095