Apex domains cannot have CNAME records.
Question and response
Question
dig olitt.org. NS
Answer
olitt.org. 5 NS serena.ns.cloudflare.com.
olitt.org. 5 NS hugh.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
hugh.ns.cloudflare.com. 1 A 108.162.193.117
hugh.ns.cloudflare.com. 1 A 172.64.33.117
hugh.ns.cloudflare.com. 1 A 173.245.59.117
hugh.ns.cloudflare.com. 1 AAAA 2606:4700:58:0:0:0:adf5:3b75
hugh.ns.cloudflare.com. 1 AAAA 2803:f800:50:0:0:0:6ca2:c175
hugh.ns.cloudflare.com. 1 AAAA 2a06:98c1:50:0:0:0:ac40:2175
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0