Apex domains cannot have CNAME records.
Question and response
Question
dig calvarychapel-horizon.com. NS
Answer
calvarychapel-horizon.com. 5 NS ns-931.awsdns-52.net.
calvarychapel-horizon.com. 5 NS ns-709.awsdns-24.net.
calvarychapel-horizon.com. 5 NS ns-1824.awsdns-36.co.uk.
calvarychapel-horizon.com. 5 NS ns-1264.awsdns-30.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0