Obtaining certificate chain for hkumockup20.its.hku.hk, one moment while we download the hkumockup20.its.hku.hk certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for hkumockup20.its.hku.hk failed
Sorry, the request for hkumockup20.its.hku.hk could not be completed...
We could not load the certificate for hkumockup20.its.hku.hk, 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.