crash happen when showing the demo of 'Debug muti view types'

[hi2hcs]

java.lang.IllegalArgumentException: ViewStub must have a valid layoutResource
at android.view.ViewStub.inflate(ViewStub.java:284)
at android.view.ViewStub.setVisibility(ViewStub.java:235)
at com.marshalchen.ultimaterecyclerview.UltimateRecyclerView.updateHelperDisplays(UltimateRecyclerView.java:862)
at com.marshalchen.ultimaterecyclerview.UltimateRecyclerView.access$400(UltimateRecyclerView.java:61)
at com.marshalchen.ultimaterecyclerview.UltimateRecyclerView$3.onItemRangeInserted(UltimateRecyclerView.java:798)
at android.support.v7.widget.RecyclerView$AdapterDataObservable.notifyItemRangeInserted(RecyclerView.java:11564)
at android.support.v7.widget.RecyclerView$Adapter.notifyItemInserted(RecyclerView.java:6871)
at com.marshalchen.ultimaterecyclerview.UltimateViewAdapter.insertInternal(UltimateViewAdapter.java:380)
at com.marshalchen.ultimaterecyclerview.demo.multiitemdemo.MultiViewTypesRecyclerViewAdapter.insert(MultiViewTypesRecyclerViewAdapter.java:54)
at com.marshalchen.ultimaterecyclerview.demo.multiitemdemo.MultiViewTypesActivity$1$1.run(MultiViewTypesActivity.java:72)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at android.os.Looper.loop(Looper.java:207)
at android.app.ActivityThread.main(ActivityThread.java:5975)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)