Apex domains cannot have CNAME records.
Question and response
Question
dig rse-evenements.org. NS
Answer
rse-evenements.org. 5 NS ns-2022.awsdns-60.co.uk.
rse-evenements.org. 5 NS ns-402.awsdns-50.com.
rse-evenements.org. 5 NS ns-488.awsdns-61.com.
rse-evenements.org. 5 NS ns-1979.awsdns-55.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0