Apex domains cannot have CNAME records.
Question and response
Question
dig mbcloudservers.com. NS
Answer
mbcloudservers.com. 3 NS paityn.ns.cloudflare.com.
mbcloudservers.com. 3 NS noah.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0