java.lang.NoClassDefFoundError: Could not initialize class org.netbeans.modules.sampler.SamplesOutputStream
   at org.netbeans.modules.sampler.InternalSampler.createInternalSampler(InternalSampler.java:85)
   at org.netbeans.modules.sampler.Sampler.createSampler(Sampler.java:102)
   at org.netbeans.core.TimableEventQueue.createSelfSampler(TimableEventQueue.java:263)
   at org.netbeans.core.TimableEventQueue.run(TimableEventQueue.java:225)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)