[Magic Leap] Package Projects fails with LeapMannequinLiveLink_C Error

When I add the Leap Motion plugin into my UE4 project, AND even with the official “LeapUnrealModules” UE4 project, both fail to package to Windows 64-bit, with the following error:

PackagingResults: Error: UStructProperty::Serialize Loading: Property 'StructProperty /Game/Modules/Rigging/LiveLink/LeapMannequinLiveLink.LeapMannequinLiveLink_C:AnimGraphNode_LiveLinkPose_043E904945C258D1A611D5968D234F1A'. Unknown structure.

UE4: 4.23
Orion: 4 (Latest downloaded)

What is wrong?