How to pass multiple webview in an AsyncTask

I need to pass several webview, to AsyncTask and they need to run in the same woe, but I'm not getting a return, I do not know how. My application has several AnyChart (Graphics) in the same layout and always returns error of Skip frame or says that WebView has to run in the same woe as the main thread.

This is my Async class:

private class LoadChart extends AsyncTask<AnyChartView, Void, Void> {

    @Override
    protected Void doInBackground(AnyChartView... any) {
        /*Your background work here */
        any[0] = (AnyChartView) getView().findViewById(R.id.bar_doughnut1);
        any[1] = (AnyChartView) getView().findViewById(R.id.bar_doughnut2);

        pieChart(any[0]);
        pieChart(any[1]);

        return null;
    }
}

This my layout:

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/linlay1"
        android:id="@+id/relBarChart"
        android:padding="10dp">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-light"
            android:text="Publicações"
            android:layout_marginStart="10dp"
            android:id="@+id/tv_bar_chart"
            android:textColor="@color/grey"
            android:textStyle="bold"
            android:textSize="12sp"
            android:layout_marginBottom="10dp"/>

        <com.anychart.AnyChartView
            android:id="@+id/bar_doughnut1"
            android:layout_below="@+id/tv_bar_chart"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:layout_centerHorizontal="true"
            />

    </RelativeLayout>

    <LinearLayout
        android:id="@+id/linlay2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/relBarChart"
        android:orientation="horizontal"
        android:padding="10dp">


        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:layout_marginEnd="5dp"
            android:layout_marginStart="5dp"
            android:background="@color/white">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:fontFamily="sans-serif-light"
                android:text="Publicações"
                android:layout_marginStart="10dp"
                android:layout_marginTop="10dp"
                android:id="@+id/tv_bar_doughnut2"
                android:textColor="@color/grey"
                android:textStyle="bold"
                android:textSize="12sp"
                android:layout_marginBottom="10dp"/>

            <com.anychart.AnyChartView
                android:id="@+id/bar_doughnut2"
                android:layout_below="@+id/tv_bar_doughnut2"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:layout_centerHorizontal="true"
                />

        </RelativeLayout>

Even when you have only one AnyChartView in the layout it returns the Skip frame error, however the graphic opens.