Apex domains cannot have CNAME records.
Question and response
Question
dig xornavexa.com. NS
Answer
xornavexa.com. 5 NS ns-52.awsdns-06.com.
xornavexa.com. 5 NS ns-1292.awsdns-33.org.
xornavexa.com. 5 NS ns-209.awsdns-26.com.
xornavexa.com. 5 NS ns-1367.awsdns-42.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0