Apex domains cannot have CNAME records.
Question and response
Question
dig cprapid.com. NS
Answer
cprapid.com. 5 NS ns3.pdns.tech.
cprapid.com. 5 NS ns2.pdns.tech.
cprapid.com. 5 NS ns1.pdns.tech.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0