What does the KeyStore Exception "Certificate chain is invalid" mean?

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This exception typically occurs when the certificate chain in a keystore is not trusted or is not properly configured. It indicates that one or more certificates in the chain cannot be validated or are not recognized as trusted by the system. This can happen if the certificate has expired, has been revoked, or does not match the hostname of the server. It can also occur if the intermediate certificates are missing or not correctly installed. Therefore, it is important to ensure that all certificates in the chain are valid, trusted, and properly configured in the keystore.