How handle Cors error in Netlify?

Hey, I tried that and got a new error, it doesn’t look like the authorization in my original link is being sent through the redirect

And I’m not sure how to make that happen.

I have a _headers file

and tried both this:
/*
Access-Control-Allow-Origin: *

https://thingproxy.freeboard.io/*
Bearer: authorization-key-here

and

/*
Access-Control-Allow-Origin: *
Bearer: authorization-key-here