How to resolve "Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty"

We just downloaded the RTC 5.0.2 Mac64 Client from https://jazz.net/downloads/rational-team-concert/releases/5.0.2/RTC-Client-Mac64-5.0.2.zip.  We also installed Java 6 from https://support.apple.com/kb/DL1572?locale=en_US because the 5.0.2 client required it.  We are running macOS High Sierra 10.13.2.  When we try to connect to and RTC 5.0.2 server, we get this error,

CRJAZ6022E Cannot log into the following server: 'blabla.domain.ibm.com'.CRJAZ0099E An HTTP error occurred when this URL was being accessed: https://blabal.domain.ibm.com:9443/jazz/versionCompatibility?clientVersion=5.0.2. Error details: java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty.  java.lang.RuntimeException: Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty  Unexpected error: java.security.InvalidAlgorithmParameterException: the trustAnchors parameter must be non-empty  the trustAnchors parameter must be non-empty