Apex domains cannot have CNAME records.
Question and response
Question
dig elclasista.org. NS
Answer
elclasista.org. 1 NS ns-1974.awsdns-54.co.uk.
elclasista.org. 1 NS ns-1492.awsdns-58.org.
elclasista.org. 1 NS ns-917.awsdns-50.net.
elclasista.org. 1 NS ns-1914.awsdns-47.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0