Apex domains cannot have CNAME records.
Question and response
Question
dig wildapricot.org. NS
Answer
wildapricot.org. 5 NS ns-1851.awsdns-39.co.uk.
wildapricot.org. 5 NS ns-709.awsdns-24.net.
wildapricot.org. 5 NS ns-373.awsdns-46.com.
wildapricot.org. 5 NS ns-1354.awsdns-41.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0