Apex domains cannot have CNAME records.
Question and response
Question
dig cloudteknologinusantara.co.id. NS
Answer
cloudteknologinusantara.co.id. 2 NS ns2.rapidwhm.com.
cloudteknologinusantara.co.id. 2 NS ns1.rapidwhm.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0