Apex domains cannot have CNAME records.
Question and response
Question
dig krenvatrix.com. NS
Answer
krenvatrix.com. 4 NS ns-1930.awsdns-49.co.uk.
krenvatrix.com. 4 NS ns-973.awsdns-57.net.
krenvatrix.com. 4 NS ns-928.awsdns-52.net.
krenvatrix.com. 4 NS ns-1012.awsdns-62.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0