Apex domains cannot have CNAME records.
Question and response
Question
dig avectra.info. NS
Answer
avectra.info. 5 NS ns77.domaincontrol.com.
avectra.info. 5 NS ns78.domaincontrol.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0