Obtaining certificate chain for eecs211.cs.northwestern.edu, one moment while we download the eecs211.cs.northwestern.edu certificate and related intermediate certificates...
Refreshing certificate chain and revocation status for eecs211.cs.northwestern.edu, one moment while we re-check the eecs211.cs.northwestern.edu certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for eecs211.cs.northwestern.edu failed
Sorry, the request for eecs211.cs.northwestern.edu could not be completed...
We could not load the certificate for eecs211.cs.northwestern.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.