Apex domains cannot have CNAME records.
Question and response
Question
dig monsaveol.com. NS
Answer
monsaveol.com. 5 NS ns-350.awsdns-43.com.
monsaveol.com. 5 NS ns-1762.awsdns-28.co.uk.
monsaveol.com. 5 NS ns-2035.awsdns-62.co.uk.
monsaveol.com. 5 NS ns-165.awsdns-20.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0