Apex domains cannot have CNAME records.
Question and response
Question
dig se4.mx-wecloud.net. NS
Answer
se4.mx-wecloud.net. 5 NS ns1.electric.net.
se4.mx-wecloud.net. 5 NS ns4.electric.net.
se4.mx-wecloud.net. 5 NS ns3.electric.net.
se4.mx-wecloud.net. 5 NS ns2.electric.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0