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