Apex domains cannot have CNAME records.
Question and response
Question
dig eventscloud.com. NS
Answer
eventscloud.com. 5 NS ns-218.awsdns-27.com.
eventscloud.com. 5 NS ns-1217.awsdns-24.org.
eventscloud.com. 5 NS ns-579.awsdns-08.net.
eventscloud.com. 5 NS ns-1937.awsdns-50.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0