Obtaining certificate chain for naosurvey.nao.org.uk, one moment while we download the naosurvey.nao.org.uk certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for naosurvey.nao.org.uk, one moment while we re-check the naosurvey.nao.org.uk certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for naosurvey.nao.org.uk failed
Sorry, the request for naosurvey.nao.org.uk could not be completed...
We could not load the certificate for naosurvey.nao.org.uk, it might not exist or we could not reach the server, complete the TLS handshake, etc.
Revoked certificates can't and should not be trusted, these certificate will cause errors like "NET::ERR_CERT_REVOKED" in browsers and expose a security risk.