unbound prefix.

[Trupen]

Caused by: java.util.concurrent.ExecutionException: com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource compilation failed app/src/main/res/layout/row_category_img.xml:2

<com.github.florent37.shapeofview.shapes.DiagonalView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:elevation="4dp" app:shape_diagonal_angle="10" app:shape_diagonal_position="bottom" android:layout_height="wrap_content">

<LinearLayout
    android:id="@+id/ll_main"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:orientation="vertical">

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </FrameLayout>
</LinearLayout>

</com.github.florent37.shapeofview.shapes.DiagonalView>