ShaderBits GDC volumes not appearing? Showing only the bounding box?

[ETS_1]

I’m on 5.0.3 and when I load the blueprint examples into the scene they turn into the boxes pictured.

Oddly the preview in the plugins folder changes to the volumes to that box too.

Playing the level doesn’t help either.

I thought I had read somewhere that the plugin or blueprints needed some fix somewhere but I can’t find where I read that.

Any insight?

[Arkiras]

Most likely, the materials are not compiling. These are ancient samples so it could be anything causing it, you’d have to open up the materials to see why.