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