I get this error every time i package Error: Ensure condition failed: ChildActorTemplate == nullptr [File:D:\Build++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Engine\Private\Components\ChildActorComponent.cpp] [Line: 95]
UATHelper: Packaging (Windows (64-bit)): LogOutputDevice: Error: Found unexpected ChildActorTemplate LinkerPlaceholderExportObject /Game/VRKeyboards/Blueprints/Keyboards/Drum/BP_DrumKeyboard.PLACEHOLDER-INST_of_PLACEHOLDER-CLASS__BP_DrumButton_C_32 when ChildActorClass is null