This is what I receive when Unreal crashes.
Assertion failed: IsValid() [File:c:\program files\epic games\ue_4.22\engine\source\runtime\core\public\Templates/SharedPointer.h] [Line: 849]
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_TobiiCore!UTobiiBlueprintLibrary::GetCombinedGazeData() [d:\jenkins\ue4\stage\4.22\package\hostproject\plugins\tobiieyetracking\source\tobiicore\private\tobiiblueprintlibrary.cpp:48]
UE4Editor_TobiiCore!UTobiiBlueprintLibrary::execGetCombinedGazeData() [d:\jenkins\ue4\stage\4.22\package\hostproject\plugins\tobiieyetracking\source\tobiicore\public\tobiiblueprintlibrary.h:23]
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll