Apex domains cannot have CNAME records.
Question and response
Question
dig artisansdumonderouen.org. NS
Answer
artisansdumonderouen.org. 5 NS ns-856.awsdns-43.net.
artisansdumonderouen.org. 5 NS ns-1688.awsdns-19.co.uk.
artisansdumonderouen.org. 5 NS ns-212.awsdns-26.com.
artisansdumonderouen.org. 5 NS ns-1514.awsdns-61.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0