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