Apex domains cannot have CNAME records.
Question and response
Question
dig acronis.com. NS
Answer
acronis.com. 5 NS ns-809.awsdns-37.net.
acronis.com. 5 NS ns-1134.awsdns-13.org.
acronis.com. 5 NS ns-1700.awsdns-20.co.uk.
acronis.com. 5 NS ns-445.awsdns-55.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0