CORS Authorization not valid in Unity Documentation?

So i’ve got a working build and I’M SO CLOSE to getting WWW working on Unity3d.

My setup is using nodejs and express to serve the WebGL game on one server, and the database on another.

Obviously, this means i’ll need to use CORS authentication like it says here:

My code:

That’s SUPPOSEDLY how you do that with ExpressJS. It throws no errors till i try and make the GET call:

what kind of url is %396.234.202.42? This looks like something got incorrectly escaped maybe?