Challenge update failures for fennelserver.hopto.org in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/1892649738
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: NXDOMAIN looking up TXT for _acme-challenge.fennelserver.hopto.org - check that a DNS record exists for this domain
The IANA public suffix is the TLD of the Registered Domain
The TLD for fennelserver.hopto.org is: org