Challenge update failures for www2.selectscience.net in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/4295437524
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: NXDOMAIN looking up TXT for _acme-challenge.www2.selectscience.net - check that a DNS record exists for this domain
The IANA public suffix is the TLD of the Registered Domain
The TLD for www2.selectscience.net is: net