When updating the DNS record to move our hosting from wordpress (proxied A) to hubspot (unproxied CNAME) we run into Error 1034.
www record was an A record pointing to a wordpress IP address with which I deleted. I then created a new CNAME record pointing to the specified hubspot CNAME provided by them with DNS only . This resulted in our domains returning a Cloudflare error page displaying error 1034.
HubSpot support said everything in our setup looked okay on their end and they believe it to be a Cloudflare issue.