Apex domains cannot have CNAME records.
Question and response
Question
dig lumisuccesso.com. NS
Answer
lumisuccesso.com. 5 NS ns2.lumisuccesso.com.
lumisuccesso.com. 5 NS ns1.lumisuccesso.com.
Authority
The response has no authority records.
Additional
ns1.lumisuccesso.com. 5 A 54.39.48.105
ns2.lumisuccesso.com. 5 A 51.79.121.204
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0