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