Yes, I don’t know the relations
i could find just that error and gregtech.log also says;
GT_DL_Thread: Failed Downloading Version Number of the latest Major Version!
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target