Some DNS records were found that indicate TXT records may have been incorrectly manually entered into DNS editor interfaces. The correct way to enter these records is to either remove the domain from the label (so enter "_acme-challenge.www.example.org" as "_acme-challenge.www") or include a period (.) at the end of the label (enter "_acme-challenge.example.org.").
The following probably-erroneous TXT records were found:
_acme-challenge.biggszm.duckdns.org.biggszm.duckdns.org. 0 IN TXT ""
_acme-challenge.biggszm.duckdns.org.biggszm.duckdns.org. 0 IN TXT ""
Challenge update failures for biggszm.duckdns.org in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/102479256
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Incorrect TXT record "" found at _acme-challenge.biggszm.duckdns.org
The IANA public suffix is the TLD of the Registered Domain
The TLD for biggszm.duckdns.org is: org
1 Certificates contributing to rate limits for this domain
Serial: 276167301023859157757475577314537732565757
NotBefore: 2021-07-14 17:24:19 +0000 UTC
Names: [biggszm.duckdns.org]
The current status.io status for Let's Encrypt
Operational