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