[CrashReport] UE4Editor_AnimGraph!FAnimPreviewInstanceProxy::Evaluate() [animpreviewinstance.cpp:158]

  152       bool FAnimPreviewInstanceProxy::Evaluate(FPoseContext& Output)
  153       {
  154       	// we cant evaluate on a worker thread here because of the key delegate needing to be fired
  155       	check(IsInGameThread());
  156       
  157 ***** 	if (CopyPoseNode.SourceMeshComponent.IsValid())
  158       	{
  159       		CopyPoseNode.Evaluate_AnyThread(Output);
  160       	}

Assertion failed: IsInGameThread() [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Editor\AnimGraph\Private\AnimPreviewInstance.cpp] [Line: 156]

UE4Editor_AnimGraph!FAnimPreviewInstanceProxy::Evaluate() [animpreviewinstance.cpp:158]
UE4Editor_Engine!FAnimInstanceProxy::EvaluateAnimation() [animinstanceproxy.cpp:1029]
UE4Editor_Engine!UAnimInstance::ParallelEvaluateAnimation() [animinstance.cpp:615]
UE4Editor_Engine!USkeletalMeshComponent::EvaluateAnimation() [skeletalmeshcomponent.cpp:1639]
UE4Editor_Engine!USkeletalMeshComponent::PerformAnimationProcessing() [skeletalmeshcomponent.cpp:1721]
UE4Editor_Engine!FParallelAnimationEvaluationTask::DoTask() [skeletalmeshcomponent.cpp:108]
UE4Editor_Engine!TGraphTask<FParallelAnimationEvaluationTask>::ExecuteTask() [taskgraphinterfaces.h:829]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasks() [taskgraph.cpp:934]
UE4Editor_Core!FTaskThreadAnyThread::ProcessTasksUntilQuit() [taskgraph.cpp:800]
UE4Editor_Core!FTaskThreadBase::Run() [taskgraph.cpp:516]
UE4Editor_Core!FRunnableThreadWin::Run() [windowsrunnablethread.cpp:76]