错误：
下面的错误是点击 视频 播放按钮时触发

======== Exception caught by widgets library =======================================================
The following assertion was thrown while applying parent data.:
Incorrect use of ParentDataWidget.

The ParentDataWidget Expanded(flex: 1) wants to apply ParentData of type FlexParentData to a RenderObject, which has been set up to accept ParentData of incompatible type StackParentData.

Usually, this means that the Expanded widget has the wrong ancestor RenderObjectWidget. Typically, Expanded widgets are placed directly inside Flex widgets.
The offending Expanded is currently placed inside a Stack widget.

The ownership chain for the RenderObject that received the incompatible parent data was:
  Center ← Expanded ← Stack ← AbsorbPointer ← Listener ← _GestureSemantics ← RawGestureDetector ← GestureDetector ← MouseRegion ← MaterialControls ← ⋯
When the exception was thrown, this was the stack: 
#0      RenderObjectElement._updateParentData.<anonymous closure> (package:flutter/src/widgets/framework.dart:6046:11)
#1      RenderObjectElement._updateParentData (package:flutter/src/widgets/framework.dart:6063:6)
#2      ParentDataElement._applyParentData.applyParentDataToChild (package:flutter/src/widgets/framework.dart:5258:15)
#3      ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:4947:14)
#4      ParentDataElement._applyParentData (package:flutter/src/widgets/framework.dart:5264:5)
#5      ParentDataElement.notifyClients (package:flutter/src/widgets/framework.dart:5308:5)
#6      ProxyElement.updated (package:flutter/src/widgets/framework.dart:5238:5)
#7      ProxyElement.update (package:flutter/src/widgets/framework.dart:5227:5)
#8      Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#9      RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5908:32)
#10     MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6464:17)
#11     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#12     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6311:14)
#13     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#14     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6311:14)
#15     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#16     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6311:14)
#17     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#18     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4920:16)
#19     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5060:11)
#20     Element.rebuild (package:flutter/src/widgets/framework.dart:4617:5)
#21     StatefulElement.update (package:flutter/src/widgets/framework.dart:5083:5)
#22     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#23     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4920:16)
#24     Element.rebuild (package:flutter/src/widgets/framework.dart:4617:5)
#25     StatelessElement.update (package:flutter/src/widgets/framework.dart:4971:5)
#26     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#27     SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6311:14)
#28     Element.updateChild (package:flutter/src/widgets/framework.dart:3590:15)
#29     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4920:16)
#30     StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5060:11)
#31     Element.rebuild (package:flutter/src/widgets/framework.dart:4617:5)
#32     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2687:19)
#33     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:882:21)
#34     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:374:5)
#35     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1175:15)
#36     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1104:9)
#37     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1015:5)
#38     _invoke (dart:ui/hooks.dart:145:13)
#39     PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:320:5)
#40     _drawFrame (dart:ui/hooks.dart:112:31)
==============

看着像是这个地方的错误：

这个问题要怎么解决

注释下面代码后不报错：