[CrashReport] UE4Editor_CoreUObject!UObject::ProcessEvent() [scriptcore.cpp:1189]

Assertion failed: !IsUnreachable() [File:D:\Build\++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\ScriptCore.cpp] [Line: 1189] MotionControllerComponent /Game/VirtualRealityBP/Maps/UEDPIE_0_Level1.Level1:PersistentLevel.BP_MotionController_C_1.MotionController Function: '/Script/HeadMountedDisplay.MotionControllerComponent:OnMotionControllerUpdated'

UE4Editor_CoreUObject!UObject::ProcessEvent() [scriptcore.cpp:1189]
UE4Editor_HeadMountedDisplay!UMotionControllerComponent::PollControllerState() [motioncontrollercomponent.cpp:453]
UE4Editor_HeadMountedDisplay!UMotionControllerComponent::FViewExtension::PreRenderViewFamily_RenderThread() [motioncontrollercomponent.cpp:516]
UE4Editor_Renderer!ViewExtensionPreRender_RenderThread() [scenerendering.cpp:2674]
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`33'::EURCMacro_FViewExtensionPreDrawCommand>::ExecuteTask() [taskgraphinterfaces.h:829]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [taskgraph.cpp:665]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [taskgraph.cpp:574]
UE4Editor_RenderCore!RenderingThreadMain() [renderingthread.cpp:331]
UE4Editor_RenderCore!FRenderingThread::Run() [renderingthread.cpp:465]
UE4Editor_Core!FRunnableThreadWin::Run() [windowsrunnablethread.cpp:76]