Apex domains cannot have CNAME records.
Question and response
Question
dig flockevents.co. NS
Answer
flockevents.co. 5 NS ns-268.awsdns-33.com.
flockevents.co. 5 NS ns-667.awsdns-19.net.
flockevents.co. 5 NS ns-1338.awsdns-39.org.
flockevents.co. 5 NS ns-1686.awsdns-18.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0