Apex domains cannot have CNAME records.
Question and response
Question
dig kluz.net. NS
Answer
kluz.net. 5 NS ns.lh.pl.
kluz.net. 5 NS ns2.lighthosting.net.
Authority
The response has no authority records.
Additional
ns.lh.pl. 5 A 3.67.205.197
ns.lh.pl. 5 A 3.76.92.90
ns2.lighthosting.net. 5 A 18.198.204.241
ns2.lighthosting.net. 5 A 52.57.104.17
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0