Apex domains cannot have CNAME records.
Question and response
Question
dig ingeniosus.net. NS
Answer
ingeniosus.net. 5 NS ns-1462.awsdns-54.org.
ingeniosus.net. 5 NS ns-382.awsdns-47.com.
ingeniosus.net. 5 NS ns-218.awsdns-27.com.
ingeniosus.net. 5 NS ns-825.awsdns-39.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0