Hello, it seems a js.org subdomain that was requested to target this repository (or another on this user/organisation) no longer works.
The subdomain requested was igorsantana.js.org and had the target of igorsantana.github.io.
To keep the js.org subdomain you should add a page with reasonable content within a month so the subdomain doesn't resolve to a 404 any longer.
Otherwise the requested subdomain will be removed from JS.ORGs zonefile and the list of active subdomains.
If you are wanting to keep the js.org subdomain and have added reasonable content, YOU MUST reply to the main cleanup issue with the response format detailed at the top to keep the requested subdomain.