Apex domains cannot have CNAME records.
Question and response
Question
dig morzavinta.com. NS
Answer
morzavinta.com. 5 NS ns-924.awsdns-51.net.
morzavinta.com. 5 NS ns-186.awsdns-23.com.
morzavinta.com. 5 NS ns-477.awsdns-59.com.
morzavinta.com. 5 NS ns-1646.awsdns-13.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0