Obtaining certificate chain for gpm.ntu.edu.sg, one moment while we download the gpm.ntu.edu.sg certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for gpm.ntu.edu.sg, one moment while we re-check the gpm.ntu.edu.sg certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for gpm.ntu.edu.sg failed
Sorry, the request for gpm.ntu.edu.sg could not be completed...
We could not load the certificate for gpm.ntu.edu.sg, 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.