Apex domains cannot have CNAME records.
Question and response
Question
dig ninjaone.com. NS
Answer
ninjaone.com. 5 NS ns-566.awsdns-06.net.
ninjaone.com. 5 NS ns-1333.awsdns-38.org.
ninjaone.com. 5 NS ns-1902.awsdns-45.co.uk.
ninjaone.com. 5 NS ns-48.awsdns-06.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0