HackerOne: Subdomain takeover of resources.hackerone.com

Hello, I just went to https://resources.hackerone.com/ and it shows an error "Non-hub domain, The URL you've accessed does not provide a hub. Please check the URL and try again." also i've checked the CNAME is poiting to read.uberflip.com which means if it is not added it can be added to any...