Apex domains cannot have CNAME records.
Question and response
Question
dig integrateurweb.org. NS
Answer
integrateurweb.org. 1 NS ns-680.awsdns-21.net.
integrateurweb.org. 1 NS ns-1721.awsdns-23.co.uk.
integrateurweb.org. 1 NS ns-196.awsdns-24.com.
integrateurweb.org. 1 NS ns-1671.awsdns-16.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0