Apex domains cannot have CNAME records.
Question and response
Question
dig lumorvexa.com. NS
Answer
lumorvexa.com. 5 NS ns-1287.awsdns-32.org.
lumorvexa.com. 5 NS ns-168.awsdns-21.com.
lumorvexa.com. 5 NS ns-1617.awsdns-10.co.uk.
lumorvexa.com. 5 NS ns-1434.awsdns-51.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0