java.lang.NullPointerException
        at org.openide.filesystems.FileUtil.normalizeFileOnWindows(FileUtil.java:1446)
        at org.openide.filesystems.FileUtil.normalizeFile(FileUtil.java:1344)
        at org.netbeans.modules.scala.stdplatform.platformdefinition.Util.createClassPath(Util.java:72)
        at org.netbeans.modules.scala.stdplatform.platformdefinition.DefaultPlatformImpl.getStandardLibraries(DefaultPlatformImpl.java:205)
        at org.netbeans.modules.scala.platform.queries.PlatformSourceForBinaryQuery.findSourceRoots2(PlatformSourceForBinaryQuery.java:99)
        at org.netbeans.modules.scala.platform.queries.PlatformSourceForBinaryQuery.findSourceRoots(PlatformSourceForBinaryQuery.java:129)
        at org.netbeans.api.java.queries.SourceForBinaryQuery.findSourceRoots2(SourceForBinaryQuery.java:123)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.createResources(GlobalSourcePath.java:298)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.access$1200(GlobalSourcePath.java:85)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.getResources(GlobalSourcePath.java:520)
        at org.netbeans.api.java.classpath.ClassPath$SPIListener.propertyChange(ClassPath.java:972)
        at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:186)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath$SourcePathImplementation.firePropertyChange(GlobalSourcePath.java:569)
        at org.netbeans.modules.java.source.classpath.GlobalSourcePath.run(GlobalSourcePath.java:230)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)