Hello Team, First of all thanks for the awesome package. But i am facing some issue when i changed SplineRangeAreaSeries graph dynamically. Below is the error i got. Also i am using the latest version of your library syncfusion_flutter_charts: ^20.1.56

══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
The following _CastError was thrown during paint():
Null check operator used on a null value

The relevant error-causing widget was:
CustomPaint
CustomPaint:file:///home/mohit/flutter/.pub-cache/hosted/pub.dartlang.org/syncfusion_flutter_charts-20.1.56/lib/src/chart/base/chart_base.dart:3022:22

When the exception was thrown, this was the stack:
#0 SplineRangeAreaChartPainter.paint (package:syncfusion_flutter_charts/src/chart/series_painter/spline_range_area_painter.dart:411:49)
#1 RenderCustomPaint._paintWithPainter (package:flutter/src/rendering/custom_paint.dart:563:13)
#2 RenderCustomPaint.paint (package:flutter/src/rendering/custom_paint.dart:605:7)
#3 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2477:7)
#4 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:187:13)
#5 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:140:15)
#6 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2477:7)
#7 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:141:11)
#8 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:100:5)
#9 PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:995:29)
#10 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:506:19)
#11 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:892:13)
#12 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:370:5)
#13 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1146:15)
#14 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1083:9)
#15 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:997:5)
#19 _invoke (dart:ui/hooks.dart:151:10)
#20 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:308:5)
#21 _drawFrame (dart:ui/hooks.dart:115:31)
(elided 3 frames from dart:async)

The following RenderObject was being processed when the exception was fired: RenderCustomPaint#572f2 relayoutBoundary=up2:
creator: CustomPaint ← RepaintBoundary ← Container ← Stack ← Container ← DecoratedBox ← Container ←
DecoratedBox ← ConstrainedBox ← Container ← Listener ← _GestureSemantics ← ⋯
parentData: (can use size)
constraints: BoxConstraints(0.0<=w<=663.1, 0.0<=h<=208.1)
size: Size(0.0, 0.0)
painter: SplineRangeAreaChartPainter#bbc9d(ValueNotifier#88647(42))
This RenderObject has no descendants.
════════════════════════════════════════════════════════════════════════════════════════════════════

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

Another exception was thrown: Null check operator used on a null value

This is my configuration

• Flutter (Channel stable, 3.0.1, on Ubuntu 20.04.4 LTS 5.13.0-41-generic, locale en_IN)
• Android toolchain - develop for Android devices (Android SDK version 31.0.0)
• Chrome - develop for the web
• Android Studio (version 2021.2)
• Connected device (3 available)
• HTTP Host Availability

Here is the code

Widget _chartWidget() {
    return SliverToBoxAdapter(
        child: Container(
      padding: EdgeInsets.only(left: 10.0, right: 10.0),
      height: MediaQuery.of(context).size.height / 1.6,
      child: Card(
        elevation: 5,
        child: chartData.length > 0
            ? SfCartesianChart(
                //zoomPanBehavior: _zoomPanBehavior,
                plotAreaBorderWidth: 0,
                title: ChartTitle(text: 'Product price comparison'),
                legend: Legend(isVisible: true),
                primaryXAxis: CategoryAxis(
                    isInversed: true,
                    majorGridLines: const MajorGridLines(width: 0),
                    labelPlacement: LabelPlacement.onTicks),
                primaryYAxis: NumericAxis(
                    axisLine: const AxisLine(width: 0),
                    labelFormat: r'${value}',
                    majorTickLines: const MajorTickLines(size: 0)),
                series: chartData.length > 0 ? _getSplineAreaSeries() : [],
                tooltipBehavior: TooltipBehavior(enable: true),
              )
            : Container(),
      ),
    ));
  }

  /// Returns the list of chart series
  /// which need to render on the spline range area chart.
  List<SplineRangeAreaSeries<ChartSampleData, String>> _getSplineAreaSeries() {
    return <SplineRangeAreaSeries<ChartSampleData, String>>[
      SplineRangeAreaSeries<ChartSampleData, String>(
        dataSource: chartData,
        color: const Color.fromRGBO(75, 135, 185, 0.5),
        borderColor: const Color.fromRGBO(75, 135, 185, 1),
        borderWidth: 3,
        borderDrawMode: RangeAreaBorderMode.excludeSides,
        xValueMapper: (ChartSampleData sales, _) => _commonUtils.changeDateFormat(sales.x, limit),
        highValueMapper: (ChartSampleData sales, _) => sales.y,
        lowValueMapper: (ChartSampleData sales, _) => sales.yValue,
        name: '${chartData[0].text}',
      ),
    ];
  }

Check above Video For Better Understanding of this issue. Please check and resolve this asap.
Thanks,
Mohit