Apex domains cannot have CNAME records.
Question and response
Question
dig calderasbiomasabages.com. NS
Answer
calderasbiomasabages.com. 5 NS ns2.calderasbiomasabages.com.
calderasbiomasabages.com. 5 NS ns1.calderasbiomasabages.com.
Authority
The response has no authority records.
Additional
ns1.calderasbiomasabages.com. 5 A 134.119.222.34
ns2.calderasbiomasabages.com. 5 A 134.119.222.38
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0