Apex domains cannot have CNAME records.
Question and response
Question
dig southsidesolidarity.org. NS
Answer
southsidesolidarity.org. 4 NS ns-1524.awsdns-62.org.
southsidesolidarity.org. 4 NS ns-994.awsdns-60.net.
southsidesolidarity.org. 4 NS ns-118.awsdns-14.com.
southsidesolidarity.org. 4 NS ns-1129.awsdns-13.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0