Assertion failed ContainerPtr - Please help!

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Hello,

Guys could you please help with the following error regarding assertion ?

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Assertion failed ContainerPtr [FileDbuild++UE5SyncEngineSourceRuntimeCoreUObjectPublicUObjectUnrealType.h] [Line 610]

UnrealEditor_CoreUObject!ProcessLocalFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1279]
UnrealEditor_CoreUObject!UObjectProcessContextOpcode() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp3094]
UnrealEditor_CoreUObject!ProcessLocalScriptFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1209]
UnrealEditor_CoreUObject!ProcessScriptFunctionvoid (cdecl)(UObject,FFrame &,void )() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1039]
UnrealEditor_CoreUObject!ProcessLocalFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1279]
UnrealEditor_CoreUObject!ProcessLocalScriptFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1209]
UnrealEditor_CoreUObject!ProcessScriptFunctionvoid (cdecl)(UObject,FFrame &,void )() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1039]
UnrealEditor_CoreUObject!ProcessLocalFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1279]
UnrealEditor_CoreUObject!UObjectProcessContextOpcode() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp3094]
UnrealEditor_CoreUObject!ProcessLocalScriptFunction() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1209]
UnrealEditor_CoreUObject!UObjectProcessInternal() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp1306]
NEW
[1133 PM]
UnrealEditor_CoreUObject!UFunctionInvoke() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectClass.cpp6665]
UnrealEditor_CoreUObject!UObjectProcessEvent() [Dbuild++UE5SyncEngineSourceRuntimeCoreUObjectPrivateUObjectScriptCore.cpp2145]
UnrealEditor_Engine!FLatentActionManagerTickLatentActionForObject() [Dbuild++UE5SyncEngineSourceRuntimeEnginePrivateLatentActionManager.cpp314]
UnrealEditor_Engine!FLatentActionManagerProcessLatentActions() [Dbuild++UE5SyncEngineSourceRuntimeEnginePrivateLatentActionManager.cpp232]
UnrealEditor_Engine!UWorldTick() [Dbuild++UE5SyncEngineSourceRuntimeEnginePrivateLevelTick.cpp1560]
UnrealEditor_UnrealEd!UEditorEngineTick() [Dbuild++UE5SyncEngineSourceEditorUnrealEdPrivateEditorEngine.cpp1924]
UnrealEditor_UnrealEd!UUnrealEdEngineTick() [Dbuild++UE5SyncEngineSourceEditorUnrealEdPrivateUnrealEdEngine.cpp531]
UnrealEditor!FEngineLoopTick() [Dbuild++UE5SyncEngineSourceRuntimeLaunchPrivateLaunchEngineLoop.cpp5825]
UnrealEditor!GuardedMain() [Dbuild++UE5SyncEngineSourceRuntimeLaunchPrivateLaunch.cpp188]
UnrealEditor!GuardedMainWrapper() [Dbuild++UE5SyncEngineSourceRuntimeLaunchPrivateWindowsLaunchWindows.cpp118]
UnrealEditor!LaunchWindowsStartup() [Dbuild++UE5SyncEngineSourceRuntimeLaunchPrivateWindowsLaunchWindows.cpp258]
UnrealEditor!WinMain() [Dbuild++UE5SyncEngineSourceRuntimeLaunchPrivateWindowsLaunchWindows.cpp298]
UnrealEditor!__scrt_common_main_seh() [Da_work1ssrcvctoolscrtvcstartupsrcstartupexe_common.inl288]
kernel32
ntdll

I have been stuck with this for entire day and I am utterly frustrated. I was playing around with FAB quixel and this started to occur.

I am welcome to all ideas.

Thank you in advance.

2

What Engine Version are you on?

I’m having this error in 5.5.3 when using a Widget Switcher, but only in Standalone and not in PIE:

Assertion failed: ContainerPtr [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\UnrealType.h] [Line: 687]