Apex domains cannot have CNAME records.
Question and response
Question
dig cliniqueveterinairelabege.com. NS
Answer
cliniqueveterinairelabege.com. 5 NS ns-1433.awsdns-51.org.
cliniqueveterinairelabege.com. 5 NS ns-1160.awsdns-17.org.
cliniqueveterinairelabege.com. 5 NS ns-176.awsdns-22.com.
cliniqueveterinairelabege.com. 5 NS ns-1639.awsdns-12.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0