Apex domains cannot have CNAME records.
Question and response
Question
dig asesorsolar.com.mx. NS
Answer
asesorsolar.com.mx. 4 NS ns10.asesorsolar.com.mx.
asesorsolar.com.mx. 4 NS ns11.asesorsolar.com.mx.
asesorsolar.com.mx. 4 NS ns8.asesorsolar.com.mx.
asesorsolar.com.mx. 4 NS ns9.asesorsolar.com.mx.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0