Apex domains cannot have CNAME records.
Question and response
Question
dig herbafuel.com. NS
Answer
herbafuel.com. 5 NS ns-792.awsdns-35.net.
herbafuel.com. 5 NS ns-948.awsdns-54.net.
herbafuel.com. 5 NS ns-1649.awsdns-14.co.uk.
herbafuel.com. 5 NS ns-1796.awsdns-32.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0