Apex domains cannot have CNAME records.
Question and response
Question
dig onlineschooloflight.org. NS
Answer
onlineschooloflight.org. 5 NS ns-1234.awsdns-26.org.
onlineschooloflight.org. 5 NS ns-1184.awsdns-20.org.
onlineschooloflight.org. 5 NS ns-1845.awsdns-38.co.uk.
onlineschooloflight.org. 5 NS ns-1580.awsdns-05.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0