Bitbucket webhook receiving "javax.net.ssl.SSLHandshakeException: General SSLEngine problem"

[mikelanghorst]

Attempting to setup a webhook from Bitbucket v. 5.16.0 to Puppet 2018.1.  When it triggers it's getting an error:

java.lang.RuntimeException: javax.net.ssl.SSLHandshakeException: General SSLEngine problem

I've added the cert from Puppet into the keystore that tomcat uses, as well as the Java JDK cacerts file, but still getting the same error.