NPE when loading in Hudson 3.0.1

[zxiiro]

I'm having issues loading this plugin in Hudson version 3.0.1 with the below error. I'm not really sure what the problem is. Any advice?

SEVERE: Failed Initializing plugin scan-plugin
java.lang.NullPointerException
        at hudson.PluginManager$2$1$2.run(PluginManager.java:315)
        at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
        at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
        at hudson.model.Hudson$4.runTask(Hudson.java:667)
        at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
        at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:724)