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