Is Unreal Engine for game developers or for engine troubleshoothers?

A real-time example of an issue I’m experiencing right now is this.

I have some models in my level; when I build the lighting, I get a NULL StaticMesh property error.

All of my meshes actually have a mesh assigned to them. (I already rebuilt the LightMass project from the Engine source)

So, as I was suggested, I tried to clear that property and reset it (luckily there are just 6 models!!! what if they were hundreds???)

While I reset the mesh, this glitch happens in the Engine model-preview

AND LADIES AND GENTLEMEN

This is me when such things happen

facepalm.jpg