github page cors error please help

[East-cloud-of-forest]

I am making a page that receives xml from open api without a server.
In devserver, I solved the cors using a proxy, but I don't know how to build it on the github page.
I know that my repositories are public and access-control-allow-origin will be * when github pages are public. But I keep getting the cors error.

Open API only supports xml format.
please help

[airtower-luna]

The problem is that the openapi.11st.co.kr server doesn't send an Access-Control-Allow-Origin header, which means your browser isn't allowed to provide the response data to your site. That is a security mechanism, see Cross-Origin Resource Sharing (CORS) for details.

You cannot solve that inside your site, it's something the openapi.11st.co.kr admins would have to change (if they want to). Alternatively you'd need your own server that retrieves the data and makes it available to your site.

[East-cloud-of-forest]

thank you so much