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