Apex domains cannot have CNAME records.
Question and response
Question
dig cceu.site. NS
Answer
cceu.site. 5 NS ns-1274.awsdns-31.org.
cceu.site. 5 NS ns-712.awsdns-25.net.
cceu.site. 5 NS ns-842.awsdns-41.net.
cceu.site. 5 NS ns-1641.awsdns-13.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0