Apex domains cannot have CNAME records.
Question and response
Question
dig outtask.com. NS
Answer
outtask.com. 3 NS a1-111.akam.net.
outtask.com. 3 NS a10-66.akam.net.
outtask.com. 3 NS a28-65.akam.net.
outtask.com. 3 NS a18-64.akam.net.
outtask.com. 3 NS a5-66.akam.net.
outtask.com. 3 NS a13-67.akam.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0