title: OIDC Liberty 8.5.5.8 - NPE in OAuth20InternalException.getEncodedTraceArg
body: <p>I am using WebSphere Liberty 8.5.5.8 (wlp-1.0.11.cl50820151201-1942) and I am trying to setup OpenID-Connect. Most of my basic samples are working, but when I try to implement "Implicit Flow" with a pure JavaScript client (I use the client samples from <a href="https://github.com/IdentityServer/IdentityServer3.Samples" rel="nofollow">https://github.com/IdentityServer/IdentityServer3.Samples</a>), I receive an NPE in the POST after the consent form:</p>
  
  <pre><code>[ERROR   ] SRVE0777E: Exception thrown by application class
  com.ibm.oauth.core.api.error.oauth20.OAuth20InternalException.getEncodedTraceArguments:76
  java.lang.NullPointerException at
  com.ibm.oauth.core.api.error.oauth20.OAuth20InternalException.getEncodedTraceArguments(OAuth20InternalException.java:76)
  at [internal classes]
  </code></pre>
  
  <p>Has anybody been successfull with WLP and setting up "Implicit Flow/Grant".</p>
  
  <p>Is anybody from IBM able to make a diagnosis? NPE in internal class is not very helpful. </p>