Apex domains cannot have CNAME records.
Question and response
Question
dig hkpll.org. NS
Answer
hkpll.org. 5 NS ns-1203.awsdns-22.org.
hkpll.org. 5 NS ns-1585.awsdns-06.co.uk.
hkpll.org. 5 NS ns-129.awsdns-16.com.
hkpll.org. 5 NS ns-1251.awsdns-28.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0