Retarget animations - crash

Development Getting Started & Setup
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1

Hello.

Whenever I trying to click “Retarget Animations” Unreal Engine 5.4 crashes.

Assertion failed: This->IsA(this) [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\Class.h] [Line: 2825]

UnrealEditor_CoreUObject
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kernel32
ntdll

Trying to retarget any Mannequin animations (from different packages) and each time it does that.

crash
crash474×519 71.6 KB