Apex domains cannot have CNAME records.
Question and response
Question
dig yhy2e.org. NS
Answer
yhy2e.org. 5 NS ns-1336.awsdns-39.org.
yhy2e.org. 5 NS ns-973.awsdns-57.net.
yhy2e.org. 5 NS ns-446.awsdns-55.com.
yhy2e.org. 5 NS ns-662.awsdns-18.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0