agent.walanja.com has no CNAME records.
Question and response
Question
dig agent.walanja.com. NS
Answer
The response has no answer records.
Authority
walanja.com. 3420 SOA ns1.cifo.co.id. admin.cmedia.co.id. 2020092807 7200 540 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0