HTTP 407 Proxy Authentication Required indicates the client must authenticate with the proxy before the request can be forwarded. The response includes a Proxy-Authenticate header specifying the authentication scheme required by the proxy.
The organization's proxy server requires credentials before allowing internet access.
Configure your HTTP client or browser with the proxy username and password.
curl -x http://proxy:8080 --proxy-user username:password https://example.com/
Verify the proxy server address, port, and authentication method in your system or browser settings.