Failed to renew TLS certificate. SniCertificate::CertificateNonvalidError: Unable to verify challenge

You need to change records from Proxied to DNS Only per [Support Guide] What problems could occur when using Cloudflare in front of Netlify?

Additionally your DNS isn’t configured correctly for external DNS as per [Support Guide] DNS Quick Start - How to set up DNS and related documentaion Configure external DNS for a custom domain | Netlify Docs

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