Apex domains cannot have CNAME records.
Question and response
Question
dig fonts.axcient.com. NS
Answer
fonts.axcient.com. 5 NS ns-978.awsdns-58.net.
fonts.axcient.com. 5 NS ns-1236.awsdns-26.org.
fonts.axcient.com. 5 NS ns-1761.awsdns-28.co.uk.
fonts.axcient.com. 5 NS ns-102.awsdns-12.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0