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We could not load the certificate for learnvietnamese.com.vn, it might not exist or we could not reach the server, complete the TLS handshake, etc.

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Created by Paul van Brouwershaven
2015 - 2019 Digitorus B.V.
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.