A RenderRepaintBoundary expected a child of type RenderBox but received a child of type RenderSliverStickyHeader.

[cloudoftg0]

this code where _StickyHeaderGrid() is widget from example "side_header.dart" class MyScrollingScreen extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( body: CustomScrollView(slivers: [ SliverList( delegate: SliverChildBuilderDelegate( (context, i) => _StickyHeaderGrid(index: i), childCount: 10, ), ), ]), ); } } is throwing this error `Restarted application in 661ms.

════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building _StickyHeaderGrid:
A RenderRepaintBoundary expected a child of type RenderBox but received a child of type RenderSliverStickyHeader.

RenderObjects expect specific types of children because they coordinate with their children during layout and paint. For example, a RenderSliver cannot be the child of a RenderBox because a RenderSliver does not understand the RenderBox layout protocol.
The RenderRepaintBoundary that expected a RenderBox child was created by: RepaintBoundary ← IndexedSemantics ← _SelectionKeepAlive ← NotificationListener ← KeepAlive ← AutomaticKeepAlive ← KeyedSubtree ← SliverList ← Viewport ← IgnorePointer-[GlobalKey#42c8d] ← Semantics ← Listener ← ⋯
The RenderSliverStickyHeader that did not match the expected child type was created by: SliverStickyHeader ← _StickyHeaderGrid ← RepaintBoundary ← IndexedSemantics ← _SelectionKeepAlive ← NotificationListener ← KeepAlive ← AutomaticKeepAlive ← KeyedSubtree ← SliverList ← Viewport ← IgnorePointer-[GlobalKey#42c8d] ← ⋯
The relevant error-causing widget was
_StickyHeaderGrid
When the exception was thrown, this was the stack
#0 RenderObjectWithChildMixin.debugValidateChild.
#1 RenderObjectWithChildMixin.debugValidateChild
#2 SingleChildRenderObjectElement.insertRenderObjectChild
#3 RenderObjectElement.attachRenderObject
#4 RenderObjectElement.mount
#5 SliverStickyHeaderRenderObjectElement.mount
... Normal element mounting (47 frames)
#52 Element.inflateWidget
#53 Element.updateChild
#54 SliverMultiBoxAdaptorElement.updateChild
#55 SliverMultiBoxAdaptorElement.createChild.
#56 BuildOwner.buildScope
#57 SliverMultiBoxAdaptorElement.createChild
#58 RenderSliverMultiBoxAdaptor._createOrObtainChild.
#59 RenderObject.invokeLayoutCallback.
#60 PipelineOwner._enableMutationsToDirtySubtrees
#61 RenderObject.invokeLayoutCallback
#62 RenderSliverMultiBoxAdaptor._createOrObtainChild
#63 RenderSliverMultiBoxAdaptor.addInitialChild
#64 RenderSliverList.performLayout
#65 RenderObject.layout
#66 RenderViewportBase.layoutChildSequence
#67 RenderViewport._attemptLayout
#68 RenderViewport.performLayout
#69 RenderObject.layout
#70 RenderBox.layout
#71 RenderProxyBoxMixin.performLayout
#72 RenderObject.layout
#73 RenderBox.layout
#74 RenderProxyBoxMixin.performLayout
#75 RenderObject.layout
#76 RenderBox.layout
#77 RenderProxyBoxMixin.performLayout
#78 RenderObject.layout
#79 RenderBox.layout
#80 RenderProxyBoxMixin.performLayout
#81 RenderObject.layout
#82 RenderBox.layout
#83 RenderProxyBoxMixin.performLayout
#84 RenderObject.layout
#85 RenderBox.layout
#86 RenderProxyBoxMixin.performLayout
#87 RenderObject.layout
#88 RenderBox.layout
#89 RenderProxyBoxMixin.performLayout
#90 RenderObject.layout
#91 RenderBox.layout
#92 RenderProxyBoxMixin.performLayout
#93 RenderCustomPaint.performLayout
#94 RenderObject.layout
#95 RenderBox.layout
#96 RenderProxyBoxMixin.performLayout
#97 RenderObject.layout
#98 RenderBox.layout
#99 RenderProxyBoxMixin.performLayout
#100 RenderObject.layout
#101 RenderBox.layout
#102 RenderProxyBoxMixin.performLayout
#103 RenderObject.layout
#104 RenderBox.layout
#105 RenderProxyBoxMixin.performLayout
#106 RenderObject.layout
#107 RenderBox.layout
#108 RenderProxyBoxMixin.performLayout
#109 RenderObject.layout
#110 RenderBox.layout
#111 MultiChildLayoutDelegate.layoutChild
#112 _ScaffoldLayout.performLayout
#113 MultiChildLayoutDelegate._callPerformLayout
#114 RenderCustomMultiChildLayoutBox.performLayout
#115 RenderObject.layout
#116 RenderBox.layout
#117 RenderProxyBoxMixin.performLayout
#118 RenderObject.layout
#119 RenderBox.layout
#120 RenderProxyBoxMixin.performLayout
#121 _RenderCustomClip.performLayout
#122 RenderObject.layout
#123 RenderBox.layout
#124 RenderProxyBoxMixin.performLayout
#125 RenderObject.layout
#126 RenderBox.layout
#127 RenderProxyBoxMixin.performLayout
#128 RenderObject.layout
#129 RenderBox.layout
#130 RenderProxyBoxMixin.performLayout
#131 RenderObject.layout
#132 RenderBox.layout
#133 RenderProxyBoxMixin.performLayout
#134 RenderObject.layout
#135 RenderBox.layout
#136 RenderProxyBoxMixin.performLayout
#137 RenderObject.layout
#138 RenderBox.layout
#139 RenderProxyBoxMixin.performLayout
#140 RenderObject.layout
#141 RenderBox.layout
#142 RenderProxyBoxMixin.performLayout
#143 RenderObject.layout
#144 RenderBox.layout
#145 RenderProxyBoxMixin.performLayout
#146 RenderObject.layout
#147 RenderBox.layout
#148 RenderProxyBoxMixin.performLayout
#149 RenderObject.layout
#150 RenderBox.layout
#151 RenderProxyBoxMixin.performLayout
#152 RenderOffstage.performLayout
#153 RenderObject.layout
#154 RenderBox.layout
#155 RenderProxyBoxMixin.performLayout
#156 RenderObject.layout
#157 RenderBox.layout
#158 _RenderTheaterMixin.performLayout
#159 RenderObject.layout
#160 RenderBox.layout
#161 RenderProxyBoxMixin.performLayout
#162 RenderObject.layout
#163 RenderBox.layout
#164 RenderProxyBoxMixin.performLayout
#165 RenderObject.layout
#166 RenderBox.layout
#167 RenderProxyBoxMixin.performLayout
#168 RenderObject.layout
#169 RenderBox.layout
#170 RenderProxyBoxMixin.performLayout
#171 RenderCustomPaint.performLayout
#172 RenderObject.layout
#173 RenderBox.layout
#174 RenderProxyBoxMixin.performLayout
#175 RenderObject.layout
#176 RenderBox.layout
#177 RenderProxyBoxMixin.performLayout
#178 RenderObject.layout
#179 RenderBox.layout
#180 RenderProxyBoxMixin.performLayout
#181 RenderObject.layout
#182 RenderBox.layout
#183 RenderProxyBoxMixin.performLayout
#184 RenderObject.layout
#185 RenderBox.layout
#186 RenderProxyBoxMixin.performLayout
#187 RenderObject.layout
#188 RenderBox.layout
#189 RenderProxyBoxMixin.performLayout
#190 RenderObject.layout
#191 RenderBox.layout
#192 RenderView.performLayout
#193 RenderObject._layoutWithoutResize
#194 PipelineOwner.flushLayout
#195 RendererBinding.drawFrame
#196 WidgetsBinding.drawFrame
#197 RendererBinding._handlePersistentFrameCallback
#198 SchedulerBinding._invokeFrameCallback
#199 SchedulerBinding.handleDrawFrame
#200 SchedulerBinding.scheduleWarmUpFrame.
#204 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:189:12)
(elided 3 frames from class _Timer and dart:async-patch)
════════════════════════════════════════════════════════════════════════════════
` Any solution?

[stan-at-work]

Your code may not be properly set up within a CustomScrollView, which could be causing this issue.