Apex domains cannot have CNAME records.
Question and response
Question
dig workstreaminc.com. NS
Answer
workstreaminc.com. 2 NS ns-786.awsdns-34.net.
workstreaminc.com. 2 NS ns-220.awsdns-27.com.
workstreaminc.com. 2 NS ns-1794.awsdns-32.co.uk.
workstreaminc.com. 2 NS ns-1341.awsdns-39.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0