Apex domains cannot have CNAME records.
Question and response
Question
dig selerakita.com. NS
Answer
selerakita.com. 2 NS ns-1168.awsdns-18.org.
selerakita.com. 2 NS ns-1484.awsdns-57.org.
selerakita.com. 2 NS ns-1171.awsdns-18.org.
selerakita.com. 2 NS ns-1983.awsdns-55.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0