Apex domains cannot have CNAME records.
Question and response
Question
dig coatonlinestore.org. NS
Answer
coatonlinestore.org. 3 NS ns-1348.awsdns-40.org.
coatonlinestore.org. 3 NS ns-976.awsdns-58.net.
coatonlinestore.org. 3 NS ns-960.awsdns-56.net.
coatonlinestore.org. 3 NS ns-1169.awsdns-18.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0