javax.net.ssl.SSLHandshakeException: PKIX path building failed
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
This message indicates that the application cannot find the correct path to the server's certificate it is trying to connect (TLS/SSL connections).
SOLUTION
Import the correct certificate in the SKSO Payara truststore if using over SSL.