What is web code 407? Understanding the Proxy Authentication Required Error

Wow, thanks for all the replies, everyone! I didn’t expect so many helpful tips.

I tried resetting my proxy settings like a few of you suggested, and it worked! Turns out, my browser was using some old cached credentials.

I also checked out Postman, and it’s such a cool tool—definitely gonna use it more often now.

Thanks again for helping me figure out *What is web code 407?* You guys are awesome!