title: Incorrect use of parent data widget. expanded widgets must be placed inside flex widgets
body: <p>I am getting the following error:</p>
  <p>i.e..,  Another exception was thrown: Incorrect use of ParentDataWidget.
  showing error on the mobile screen.</p>
  <pre><code> @override
    Widget build(BuildContext context) {
  
      return MaterialApp(
        title: widget.title,
        theme: ThemeData.light().copyWith(
          platform: _platform ?? Theme.of(context).platform,
        ),
        home: DefaultTabController(
          length: categoryNames.length,
          child: Scaffold(
          appBar: AppBar(
            title: Text(widget.title),
                   ),
          body: SafeArea(
              child: Column(
                children: &lt;Widget&gt;[
                  Chewie(
                    controller: _chewieController,
                  ),
                  TabBar(
                    labelColor:Colors.black,
                    tabs: categoryNames,
                  ),
                  Expanded(
                    child: TabBarView(
                      children: [
                        ImageList()
                      ],
                    ),
                  )
                  /*TabBarView(
                    children: [
                      Icon(Icons.directions_car),
                      Icon(Icons.directions_transit),
                      Icon(Icons.directions_bike),
                    ],
                  )*/
                ],
              )
          ),
        ),
        ),
      );
    }
  </code></pre>
  <p>It's my code, please check and let me know the issue.</p>