Getting Error 407 - Proxy Authentication Required. How Do I Fix This? or Error 407: Proxy Won't Let M

error 407 is all about proxy auth. If you didn’t set up a proxy, it’s definitely your work network.

Try this tool: Fiddler (https://www.telerik.com/fiddler). It can help diagnose proxy issues.

But honestly, just ask IT. They’ll either fix it or tell you how to log in properly.