Getting HTTP Error 407 - Proxy Authentication Required. How Do I Fix This? Alternatively, for a more concise

Bro, same. http error 407 usually pops up when the proxy’s like "who dis?"

Try this:
1. Open IE (yeah, I know)
2. Go to Internet Options > Connections > LAN settings
3. Check if proxy’s enabled there.

Sometimes Windows uses IE’s proxy settings globally. Weird, but worth a shot.