Apex domains cannot have CNAME records.
Question and response
Question
dig chapron-international.com. NS
Answer
chapron-international.com. 1 NS ns-1754.awsdns-27.co.uk.
chapron-international.com. 1 NS ns-456.awsdns-57.com.
chapron-international.com. 1 NS ns-208.awsdns-26.com.
chapron-international.com. 1 NS ns-729.awsdns-27.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0