_acme-challenge.webdisk.rdlc232145.ciberserver.com has no CNAME records.
Question and response
Question
dig _acme-challenge.webdisk.rdlc232145.ciberserver.com. NS
Answer
The response has no answer records.
Authority
rdlc232145.ciberserver.com. 3821 SOA ns1.ciberserver.com. root.rdlc232145.ciberserver.com. 2026012300 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0