Apex domains cannot have CNAME records.
Question and response
Question
dig negociefacilbp.com.br. NS
Answer
negociefacilbp.com.br. 5 NS ns-819.awsdns-38.net.
negociefacilbp.com.br. 5 NS ns-1724.awsdns-23.co.uk.
negociefacilbp.com.br. 5 NS ns-376.awsdns-47.com.
negociefacilbp.com.br. 5 NS ns-1084.awsdns-07.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0