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