Exception thrown in DialogFragment

[usernotnull]

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.drawable.Drawable.getIntrinsicHeight()' on a null object reference
at com.yqritc.recyclerviewflexibledivider.HorizontalDividerItemDecoration.getDividerSize(HorizontalDividerItemDecoration.java:90)
at com.yqritc.recyclerviewflexibledivider.HorizontalDividerItemDecoration.setItemOffsets(HorizontalDividerItemDecoration.java:79)
at com.yqritc.recyclerviewflexibledivider.FlexibleDividerDecoration.getItemOffsets(FlexibleDividerDecoration.java:158)
at android.support.v7.widget.RecyclerView.getItemDecorInsetsForChild(RecyclerView.java:4489)
at android.support.v7.widget.RecyclerView$LayoutManager.measureChildWithMargins(RecyclerView.java:8443)

The above exception is thrown when the decoration is used with a dialog , i'll copy the style I used below:

<style name="NoFrameDialog" parent="@style/AppTheme.Dialog">

    <item name="android:windowBackground">@null</item>
    <item name="android:windowFrame">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:backgroundDimEnabled">true</item>
</style>

I also checked it happens when using no dialog style so it's a matter of using the decoration with a recyclerview in a DialogFragment