"This hostname is not covered by a certificate." Cloudflare recommending: "purchase Advanced Certificate Manager to use Total TLS for full certificate coverage of proxied hostnames."

[K-J-VV]

Describe the bug
Everything seems to be working (IPv4 is being updated on Cloudflare automagically). However, when DNS update is handled by cloudflare-ddns the entry made has a warning icon next to it and the following error message:

This hostname is not covered by a certificate. To ensure full coverage, purchase Advanced Certificate Manager to use Total TLS for full certificate coverage of proxied hostnames.

When I manually select Add Record and create the DNS entry on my own this warning does not show up at all.

Screenshots

Error messages

To help avoid ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors, Cloudflare automatically shows an error message - This hostname is not covered by a certificate - on proxied DNS records not covered by a TLS certificate.

[K-J-VV]

For anyone encountering this trying to DDNS your base domain (e.g., example.com)

Don't enter the name of your domain: example.com

Simply enter root (i.e., @)