PKIX path building failed:

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It produced this output:

nested exception is: PKIX path building failed: PKIXCertPathBuilderImpl could not build a valid CertPath.; internal cause is: The certificate issued by CN=DST Root CA X3, O=Digital Signature Trust Co. is not trusted; internal cause is: Certificate chaining error


What are you trying to do?

Thank you

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This usually means that you’re missing the intermediate certificate, which is currently one of these

and is automatically provided to the Let’s Encrypt client when the certificate is issued (Certbot, for example, saves it into chain.pem and also fullchain.pem).

As @stevenzhu’s question indicates, we can’t help you further unless we understand more context about your problem.

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