Bouncy Castle throws NullPointerException after JDK update

Issue

• We see an exception like the following after updating our JDK:

        java.lang.NullPointerException
                at org.bouncycastle.crypto.signers.PSSSigner.generateSignature(Unknown Source)
                at org.bouncycastle.jcajce.provider.asymmetric.rsa.PSSSignatureSpi.engineSign(Unknown Source)
                at java.security.Signature$Delegate.engineSign(Signature.java:1382)
                at java.security.Signature.sign(Signature.java:698)
                at sun.security.ssl.ECDHServerKeyExchange$ECDHServerKeyExchangeMessage.<init>(ECDHServerKeyExchange.java:181)
                at sun.security.ssl.ECDHServerKeyExchange$ECDHServerKeyExchangeProducer.produce(ECDHServerKeyExchange.java:499)
                at sun.security.ssl.ClientHello$T12ClientHelloConsumer.consume(ClientHello.java:1020)
                at sun.security.ssl.ClientHello$ClientHelloConsumer.onClientHello(ClientHello.java:727)
                at sun.security.ssl.ClientHello$ClientHelloConsumer.consume(ClientHello.java:693)
                at sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:377)
                at sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:444)
                at sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:968)
                at sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:955)