Objects not showing up

So I made this here.

Then whenever I copy and paste it and/or make one just like it this happens.

I am expecting that I should just be able to copy and paste the one you see in the first picture without issues but nope, it always makes objects disappear and do some weird stuff. I cannot even start making one like it without it doing the same thing you see in picture two.

I found out I just had to build my lighting thanks :slight_smile: