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