The mp android chart does not work correctly when first installing the application on the device

Question

When first installing the application on the device, the mp android chart does not show correctly, what is the reason ?

Here is my code:

viewModel.weekRead( ( calender.get(Calendar.DAY_OF_MONTH) - 7 ) , ( calender.get(Calendar.MONTH) + 1 ) ).observe(viewLifecycleOwner) {

        val weekList = ArrayList<BarEntry>()

        for (i in it) {

            weekList.add ( BarEntry ( i.day.toFloat() , i.step_value.toFloat() ) )
        }

        val barDataSet = BarDataSet ( weekList , " " )

        barDataSet.setColors(ColorTemplate.COLORFUL_COLORS, 250)
        barDataSet.valueTextSize = 12F

        val barData = BarData(barDataSet)

        binding.weekChart.setFitBars(true)
        binding.weekChart.data = barData
        binding.weekChart.animateY(2000)

        binding.weekChart.setTouchEnabled(false)
        binding.weekChart.description = null

        binding.weekChart.xAxis.apply {

            setDrawGridLines(false)
            setDrawLabels(false)
        }

        binding.weekChart.axisLeft.axisMinimum = 0f
        binding.weekChart.axisRight.axisMinimum = 0f

        binding.weekChart.refreshDrawableState()
        binding.weekChart.invalidate()
}

For more details, I'm throwing the layout part in addition.

Here is my XML codes :

<androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:text="Aylık Adım Sayısı"
            app:layout_constraintEnd_toEndOf="@+id/mount_chart"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="@+id/mount_chart"
            app:layout_constraintTop_toTopOf="parent" />

        <com.github.mikephil.charting.charts.BarChart
            android:id="@+id/mount_chart"
            android:layout_width="336dp"
            android:layout_height="254dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView3" />

</androidx.constraintlayout.widget.ConstraintLayout>

Finally, the image of the error :

enter image description here