Apex domains cannot have CNAME records.
Question and response
Question
dig multixvers.ovh. NS
Answer
multixvers.ovh. 5 NS ns20.ovh.net.
multixvers.ovh. 5 NS dns20.ovh.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0