Apex domains cannot have CNAME records.
Question and response
Question
dig it-invest.ua. NS
Answer
it-invest.ua. 5 NS wilson.ns.cloudflare.com.
it-invest.ua. 5 NS lina.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0