# Pastebin G5c1DAT9
java.lang.ClassCastException: net.sf.json.JSONNull cannot be cast to net.sf.json.JSONObject
	at hudson.model.ParametersDefinitionProperty._doBuild(ParametersDefinitionProperty.java:159)
	at jenkins.model.ParameterizedJobMixIn.doBuild(ParameterizedJobMixIn.java:211)
	at jenkins.model.ParameterizedJobMixIn$ParameterizedJob.doBuild(ParameterizedJobMixIn.java:425)
	at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
	at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:343)
	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:184)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:117)
	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:129)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)
Caused: javax.servlet.ServletException
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:765)
	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
	at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:248)