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