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