So SM_Cube_01 doesn’t exist in my default project, and I’m not sure how I would go about finding and adding it (even though it does specify it comes with the VREditor). I’d suggest having the specified static mesh be something more likely to be in a default proejct, like ‘Shape_Cube’ from the StarterContent, at least for people obsesive enough to try and follow the tutorial exactly.
The editor has some basic primitive assets included always, e.g. sphere, cube, cylinder. It should only reference those.