Sep 13, 2017 2:43:36 PM WARNING org.eclipse.jetty.util.log.JavaUtilLog warn
Error while serving https://jenkins/jenkins/descriptorByName/com.orctom.jenkins.plugin.globalpostscript.GlobalPostScript/fillScriptItems
java.lang.NullPointerException
 at java.util.Collections.addAll(Collections.java:5400)
 at com.orctom.jenkins.plugin.globalpostscript.GlobalPostScript$DescriptorImpl.doFillScriptItems(GlobalPostScript.java:258)
 at java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:627)
 at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:343)
Caused: java.lang.reflect.InvocationTargetException
 at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:347)
 at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:184)
 at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:117)

Collections.addAll(items, scriptFolder.list(filter));