Why I Receive the error "hostname uses an unsupported protocol."

[emersong20.email]

cloudflared tunnel run
[tunnel runs successfully…]
cloudflared tunnel route dns HOSTNAME TUNNEL_ID

When I access the hostname:
neto.linode.fnt.work

The connection for this site is not secure

neto.linode.fnt.work uses an unsupported protocol.
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

How could I solve it?

[sdayman]

Subdomain too deep

This tutorial covers a possible reason for the SSL_ERROR_NO_CYPHER_OVERLAP and ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors (Firefox and Chrome respectively) when seen on a subdomain. The Cloudflare universal certificates cover example.com and *.example.com. This means that it covers any subdomain one level below the domain you signed up with. It will cover www.example.com and subdomain.example.com, as these are one level below the root domain, example.com. The certificate will not cover www.sub…

[emersong20.email]

Thank you!

Unfortunately I try to use in a “1-level” subdomain and I get the same error:

cdn.montarumnegocio.com
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

[emersong20.email]

Now, I receive the 1001 error
weird