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.classpth.PlatformClassPathProvider.findClassPath(PlatformClassPathProvider.java:80)
        at org.netbeans.api.java.classpath.ClassPath.getClassPath(ClassPath.java:538)
        at org.netbeans.modules.java.source.tasklist.TaskCache.isInError(TaskCache.java:330)
        at org.netbeans.modules.java.source.tasklist.ErrorAnnotator$1.run(ErrorAnnotator.java:309)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)