Crash on 4.4 device when scrolling privacy policy page

06-20 16:07:45.909 20691-20691/com.noodoe.sunray.alpha E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.noodoe.sunray.alpha, PID: 20691
    java.lang.NullPointerException
        at android.widget.ScrollBarDrawable.setAlpha(ScrollBarDrawable.java:225)
        at android.view.View.onDrawScrollBars(View.java:11980)
        at android.view.View.draw(View.java:14512)
        at android.view.View.getDisplayList(View.java:13403)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.View.draw(View.java:14223)
        at android.view.ViewGroup.drawChild(ViewGroup.java:3118)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2955)
        at android.support.constraint.ConstraintLayout.dispatchDraw(ConstraintLayout.java:1963)
        at android.view.View.draw(View.java:14509)
        at android.view.View.getDisplayList(View.java:13403)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3092)
        at android.view.View.getDisplayList(View.java:13341)
        at android.view.View.getDisplayList(View.java:13445)
        at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)
        at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2431)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2301)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1047)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5896)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
        at android.view.Choreographer.doCallbacks(Choreographer.java:574)
        at android.view.Choreographer.doFrame(Choreographer.java:544)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5105)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
        at dalvik.system.NativeStart.main(Native Method)