Apex domains cannot have CNAME records.
Question and response
Question
dig scs-smartvisions.com. NS
Answer
scs-smartvisions.com. 5 NS ns014.paragon-cc.de.
scs-smartvisions.com. 5 NS ns013.paragon-cc.de.
Authority
The response has no authority records.
Additional
ns013.paragon-cc.de. 5 A 57.133.89.103
ns014.paragon-cc.de. 5 A 57.133.89.104
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0