MID server error "PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target"Issue MID Server upgrade from Paris to Rome failed. While investigating issue, below error is noticed in agent logs: 2021/10/11 10:21:03 | javax.net.ssl|ERROR|13|MIDServer|2021-10-11 10:21:03.280 BST|TransportContext.java:342|Fatal (CERTIFICATE_UNKNOWN): PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target (2021/10/11 10:21:03 | "throwable" : {2021/10/11 10:21:03 | sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target2021/10/11 10:21:03 | at java.base/sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:439)2021/10/11 10:21:03 | at java.base/sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:306) CauseDue to change in Installation directory Certificate validation with Key-store getting failed.ResolutionTo fix this issue update config file for MID server and set below parameters to "False" "mid.ssl.bootstrap.default.check._cert_revocation""mid.ssl.bootstrap.default.check._cert_chain""mid.ssl.bootstrap.default.check._cert_hostname" Once finished, wait a while. Once the upgrade is complete, change the aforementioned values back to "True"