The client lacks sufficient authorization

certbot で '--webroot' オプションを使用した際に、以下のエラー。

$ sudo certbot certonly --agree-tos --webroot -w /var/www/html/octaviadata.com -d octaviadata.com -d www.octaviadata.com
Failed authorization procedure. octaviadata.com (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://octaviadata.com/.well-known/acme-challenge/rqwboQw8jC_FHcDNT_lMr_hY1yNEC_8qqhnGf4hHQOc: "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body bgcolor=\"white\">\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>"

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: animal.octaviadata.com
   Type:   unauthorized
   Detail: Invalid response from
   http://octaviadata.com/.well-known/acme-challenge/rqwboQw8jC_FHcDNT_lMr_hY1yNEC_8qqhnGf4hHQOc:
   "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body
   bgcolor=\"white\">\r\n<center><h1>404 Not
   Found</h1></center>\r\n<hr><center>"

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address.

'--nginx' オプションで解決。

$ sudo certbot --nginx certonly --agree-tos --webroot -w /var/www/html/octaviadata.com -d octaviadata.com -d www.octaviadata.com