cannot run this code with flutter 3.3.7

[joyhope]

flutter run -d chrome

══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown during performLayout():
RenderFlex children have non-zero flex but incoming height constraints are unbounded.
When a column is in a parent that does not provide a finite height constraint, for example if it is
in a vertical scrollable, it will try to shrink-wrap its children along the vertical axis. Setting a
flex on a child (e.g. using Expanded) indicates that the child is to expand to fill the remaining
space in the vertical direction.
These two directives are mutually exclusive. If a parent is to shrink-wrap its child, the child
cannot simultaneously expand to fit its parent.
Consider setting mainAxisSize to MainAxisSize.min and using FlexFit.loose fits for the flexible
children (using Flexible rather than Expanded). This will allow the flexible children to size
themselves to less than the infinite remaining space they would otherwise be forced to take, and
then will cause the RenderFlex to shrink-wrap the children rather than expanding to fit the maximum
constraints provided by the parent.
If this message did not help you determine the problem, consider using debugDumpRenderTree():
https://flutter.dev/debugging/#rendering-layer
http://api.flutter.dev/flutter/rendering/debugDumpRenderTree.html
The affected RenderFlex is:
RenderFlex#815cd relayoutBoundary=up33 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE(creator: Column ←
RepaintBoundary ← CustomPaint-[GlobalKey#62255] ← MouseRegion ← Listener ← _GestureSemantics ← RawGestureDetector ←
RepaintBoundary ← NotificationListener ← NotificationListener ←
_MaterialScrollbar ← Scrollbar ← ⋯, parentData: (can use size), constraints: BoxConstraints(w=582.3, 0.0<=h<=Infinity),
size: MISSING, direction: vertical, mainAxisAlignment: start, mainAxisSize: min, crossAxisAlignment: center,
verticalDirection: down)
The creator information is set to:
Column ← RepaintBoundary ← CustomPaint-[GlobalKey#62255] ← MouseRegion ← Listener ←
_GestureSemantics ← RawGestureDetector ← RepaintBoundary ←
NotificationListener ← NotificationListener ←
_MaterialScrollbar ← Scrollbar ← ⋯
The nearest ancestor providing an unbounded width constraint is: _RenderSingleChildViewport#7008e relayoutBoundary=up16
NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE:
needs compositing
creator: _SingleChildViewport ← IgnorePointer-[GlobalKey#9d247] ← Semantics ← Listener ←
_GestureSemantics ← RawGestureDetector-[LabeledGlobalKey#9c75f] ←
Listener ← _ScrollableScope ← _ScrollSemantics-[GlobalKey#975b4] ←
NotificationListener ← RepaintBoundary ← CustomPaint-[GlobalKey#81613]
← ⋯
parentData: (can use size)
constraints: BoxConstraints(w=908.0, 0.0<=h<=953.0)
size: MISSING
offset: Offset(0.0, -0.0)

[purinda]

Have the same problem.

[hbbbs]

I also encountered the same problem and solved it using the following link：
#53 (comment)