Obtaining certificate chain for ajou.ac.kr, one moment while we download the ajou.ac.kr certificate and related intermediate certificates...
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Revocation check via OCSP and CRL for ajou.ac.kr failed
Sorry, the request for ajou.ac.kr could not be completed...
We could not load the certificate for ajou.ac.kr, 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.