Getting HTTP 407 Proxy Authentication Required – How to Fix It? or Why Am I Seeing HTTP 407 and How D

Bro, http 407 is like a bad ex—won’t leave you alone.

Had this happen when my password expired but the error was vague af. Check if your creds are still valid in another app (like Outlook).

Also, some proxies hate certain user agents. Try switching browsers or spoofing one with an extension.