Apex domains cannot have CNAME records.
Question and response
Question
dig navigacloud.com. NS
Answer
navigacloud.com. 5 NS ns-387.awsdns-48.com.
navigacloud.com. 5 NS ns-1260.awsdns-29.org.
navigacloud.com. 5 NS ns-953.awsdns-55.net.
navigacloud.com. 5 NS ns-1537.awsdns-00.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0