Apex domains cannot have CNAME records.
Question and response
Question
dig tribratapolresgrobogan.com. NS
Answer
tribratapolresgrobogan.com. 5 NS ns-491.awsdns-61.com.
tribratapolresgrobogan.com. 5 NS ns-1841.awsdns-38.co.uk.
tribratapolresgrobogan.com. 5 NS ns-1262.awsdns-29.org.
tribratapolresgrobogan.com. 5 NS ns-1981.awsdns-55.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0