Apex domains cannot have CNAME records.
Question and response
Question
dig profistroi.com. NS
Answer
profistroi.com. 5 NS ns-2042.awsdns-63.co.uk.
profistroi.com. 5 NS ns-360.awsdns-45.com.
profistroi.com. 5 NS ns-147.awsdns-18.com.
profistroi.com. 5 NS ns-1358.awsdns-41.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0