Apex domains cannot have CNAME records.
Question and response
Question
dig advancedstorytellingworkshop.com. NS
Answer
advancedstorytellingworkshop.com. 4 NS ns-1735.awsdns-24.co.uk.
advancedstorytellingworkshop.com. 4 NS ns-955.awsdns-55.net.
advancedstorytellingworkshop.com. 4 NS ns-1712.awsdns-22.co.uk.
advancedstorytellingworkshop.com. 4 NS ns-2006.awsdns-58.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0