Argo site reports "This site can’t provide a secure connection" in Chrome

# This site can’t provide a secure connection

**vault.pki.xxxxx.xxx**  uses an unsupported protocol.

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

All setup via CNAME records and works for other subdomains. If I use vault.xxxxx.xxx then that works. Any ideas?

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I have paid for a domain SSL Cerrtificate and I have just checked it does not include that subdomain. Let me add it and see what happens then. Thanks for the pointer as I thought I had it there already.

Edit: Checked and it was missing from the SSL Certificate. Deleted and placed a new order and it resolved the issue. Missed that.

Thanks @sdayman

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