Cannot set primary domain to www version - "We're provisioning a certificate for your site, you cannot change custom domains until that process completes"

I’m trying to switch my DNS setup to have the primary domain be the recommended www.domain rather than the plain root domain. But I get the error “We’re provisioning a certificate for your site, you cannot change custom domains until that process completes”. There’s no way to cancel the certificate provisioning, and the certificate provisioning in turn is waiting on the DNS to be confirmed – it’s a loop.

I see many people have had this issue before, and Support was needed to intervene. Please help. My site is at: visionary-malasada-9ea622.netlify.app