IP = 35.166.24.88
Content type of robots.txt is text/html;charset=UTF-8!
Look up this url in the url tool
https://subscription.manning.com/.well-known/acme-challenge: 404 text/html;charset=utf-8
https://subscription.manning.com/.well-known/csvm: 404 text/html;charset=utf-8
https://subscription.manning.com/.well-known/nostr.json: 404 text/html;charset=utf-8
https://subscription.manning.com/.well-known/security.txt: 404 text/html;charset=utf-8
https://subscription.manning.com/.well-known/traffic-advice: 404 text/html;charset=utf-8