Apex domains cannot have CNAME records.
Question and response
Question
dig myclickfunnels.com. NS
Answer
myclickfunnels.com. 5 NS wesley.ns.cloudflare.com.
myclickfunnels.com. 5 NS sneh.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0