Sadly I get this on VR preview on 5.5.1
Assertion failed: !GRDGBuilderActive [File:D:\build\++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderGraphValidation.cpp] [Line: 136]
Another FRDGBuilder already exists on the stack. Only one builder can be created at a time. This builder instance should be merged into the parent one.
UnrealEditor_RenderCore
UnrealEditor_OculusXRHMD
UnrealEditor_OculusXRHMD
UnrealEditor_OculusXRHMD
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Renderer
UnrealEditor_Renderer
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_RenderCore
UnrealEditor_RenderCore
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll
I just DLd the RAR and unzipped to my project plugins folder. Probably something on my end.