Apex domains cannot have CNAME records.
Question and response
Question
dig st8mntsboutique.com. NS
Answer
st8mntsboutique.com. 5 NS ns-2003.awsdns-58.co.uk.
st8mntsboutique.com. 5 NS ns-884.awsdns-46.net.
st8mntsboutique.com. 5 NS ns-596.awsdns-10.net.
st8mntsboutique.com. 5 NS ns-1477.awsdns-56.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0